内容

• 说明（废话）：上学期写的课程设计，主题是外卖管理系统，希望可以模拟网上订餐，店家工作，专人管理的过程。并实现注册与登录以及基本信息的输出，因为个人比较懒，一直没有整理上去，今天得空，要是得到大家的宝贵意见的话，会不胜荣幸。
• 重点内容

  三端登录 ：分别为管理员，用户以及店主；两端注册，分别为用户以及店铺，其中店铺的注册成功需要得到管理员的审核。

  管理员端可以查看店铺信息，店铺信息修改（分为增删改查），处理申请店铺，和修改本人信息。
  用户端分为用户相关（为用户本人对自己信息的操作），查看订单，查看菜品，购买菜品，以及订单排序。
  管理员端为增添菜品，删除菜品，修改菜品，查看菜品以及业绩查看（统计总订单与总收入）。

另外：
1. 店家注册需要的到管理员的认证，认证通过之后才可登录
2. 密码修改需要输入旧的密码，三次错误可以找回密码，输入手机号，若手机号匹配得当，则可产生三位数的随机验证码，输入验证码即可修改。
3. 对于已超过三分钟的订单不能修改，因为已经配送
4. 限制了用户的余额，当购买时余额不足时，需要进行账户的充值，而购买结束后，账户的余额也会相应的减少

以下为功能模块图：

以下为函数调用关系图：

以下为整个代码：

#include<stdio.h>
#include<stdlib.h>
#include<string.h> 
#include<windows.h>
#include<time.h>
#include<conio.h>
void choose();
//建立关于店铺的结构体 
typedef struct shop
{
    char name[20];
    char phone[20];
    char address[30];
    char password[20];
    struct shop *next;
}shop,*link_shop;
//建立关于订单的结构体 
typedef struct food
{
    char name[20];
    int type;
    int amount;
    int price;
    int total;
    char shop[20];
    char yonghu[20];
    char leibie[20]; 
    struct food *next; 
}food,*link_food;
//建立关于用户的结构体
typedef struct user
{
    char name[20];
    char delivery[39];
    char password[15];
    char number[15];
    int score;
    struct user *next;
}user,*link_user;
typedef struct money
{
    char person[20];
    char card[25];
    char mima[20];
    struct money *next;
}money,*link_money;
char yh[20];//用户设置全局变量 
char dp[20];//店铺设置全局变量  
time_t start,end;
//函数声明
void foodwrite(link_food LF);
void shopwrite1(link_shop LS);
void dingdanwrite(link_food LF);
void user_moneywrite(link_user LM);
void welcome()
{
    int i=0;
    char a[52]="▲▼WELCOME TO RESTAURANT MANAGEMENT SYSTEM▲▼";
    //system("color 0a");
    printf("\n\n\n\n\t\t");
    while(a[i])
    {
        printf("%c",a[i]);
        Sleep(50);
        i++;
    }
    printf("\n\n\n\n\t\t");
}
void Exit()
{
    int i=0;
    system("cls");
    char a[20]="LOVE you,byebye^_^";
    system("color 03");
    printf("\n\n\n\t\t\t");
    while(a[i])
    {
        printf("%c",a[i]);
        Sleep(100);
        i++;
    }
}
void ME()
{
    system("color 0b");
    printf("\n\n\n\t\t☆★  W E L C O M E  ☆★\n\n\t这里是外卖管理系统，请选择接下来的操作：");
    printf("\n\n\t\t\t1.登陆");
    printf("\t\t\t2.注册\t\t\t0.退出\n"); 
}
//主菜单（登陆或者注册）   
void MENU()
{
    printf("\n\n\n\n\t\t\t\t\t================================\n");
    printf("\t\t\t\t\t     外  卖  管  理  系  统     \n");
    printf("\t\t\t\t\t          1.管理员登陆          \n");
    printf("\t\t\t\t\t          2.用户登录            \n");
    printf("\t\t\t\t\t          3.店家登陆            \n");
    printf("\t\t\t\t\t          0.返回上一级          \n");
    printf("\t\t\t\t\t================================\n");
}
//管理员选项 
void MENU1()
{
    system("color 0f");
    printf("                                                                         温馨小提示：按5可以清屏哦^-^\n");
    printf("\n\n\t\t\t\t\t1.查看店铺信息▲\n");
    printf("\t\t\t\t\t--------------\n");
    printf("\t\t\t\t\t2.店铺信息修改▼\n");
    printf("\t\t\t\t\t--------------\n");
    printf("\t\t\t\t\t3.处理申请店铺▲\n");
    printf("\t\t\t\t\t--------------\n");
    printf("\t\t\t\t\t4.修改本人信息▼\n");
    printf("\t\t\t\t\t--------------\n");
    printf("\t\t\t\t\t0.返回上一级  ▲\n");
}
//用户选项 
void MENU2()
{
    system("color 0f");
    printf("\n\n\t\t\t\t 1.用户相关 ▲\t\t\t 5.购买菜品 ▼\n"); 
    printf("\t\t\t\t---------------\t\t\t---------------\n");
    printf("\t\t\t\t 2.查看订单 ▲\t\t\t 6.订单排序▼\n");
    printf("\t\t\t\t---------------\t\t\t---------------\n");
    printf("\t\t\t\t 3.查看菜品 ▲\t\t\t 0.返回上级 ▼\n");
    printf("\t\t\t\t---------------\t\t\t---------------\n");
    printf("\t\t\t\t 4.修改订单 ▲\n");
}
//店主选项 
void MENU3()
{
    system("color 0f");
    printf("\n\n\n\t\t\t ________ Shop Version _______\n");
    printf("\t\t\t|                             |\n");
    printf("\t\t\t|          1.添加菜品         |\n");
    printf("\t\t\t|          2.修改菜品         |\n");
    printf("\t\t\t|          3.删除菜品         |\n");
    printf("\t\t\t|          4.查看菜品         |\n");
    printf("\t\t\t|          5.查看业绩         |\n");
    printf("\t\t\t|          0.返回上一级       |\n");
    printf("\t\t\t|_____________________________|\n");
}
//建立关于单链表
void *creatf()
{
    int i=0,n;
    link_food LF;
    food *s,*r;
    char a[10];
    //srand((unsigned)time(NULL));//产生随机数的种子 
    LF=(food *)malloc(sizeof(food));
    LF->next=NULL;
    r=LF;
    while(1)
    {
        printf("请输入菜的名称：");
        scanf("%s",a);
        if(strcmp(a,"0")!=0)
        {
            s=(food *)malloc(sizeof(food));
            printf("请输入菜的单价：");
            scanf("%d",&s->price);
            printf("请输入菜的类别");
            scanf("%s",s->leibie); 
            strcpy(s->name,a);
            s->total=(s->amount)*(s->price);
            r->next=s;
            s->next=NULL;
            r=s;
        } 
        else
            break;
    }
    foodwrite(LF); 
} 
shop *creats()
{
    char a[30],b[20],c[15],d[20];
    link_shop LS;
    shop *s,*r;
    LS=r=(shop *)malloc(sizeof(shop));
    LS->next=NULL;
    r=LS;
    while(1)
    {
        printf("请输入店铺信息:\n");
        printf("\t\t●    店铺名称：");
        scanf("%s",a);
        printf("\n\t\t●    店铺电话：");
        scanf("%s",b);
        if(strcmp(b,"0")!=0)
        {
            printf("\n\t\t●    店铺地址：");  
            scanf("%s",c);
            printf("\n\t\t●    店铺密码：");  
            scanf("%s",d);
            s=(shop *)malloc(sizeof(shop));
            strcpy(s->name,a);
            strcpy(s->phone,b);
            strcpy(s->address,c);
            strcpy(s->password,d);
            r->next=s;
            s->next=NULL;
            r=s;
        }
        else
            break;
    }
    return LS; 
}
void Outputshop(link_shop Ls)
{
    int n=0;
    shop *p,*u;
    p=Ls->next;
    system("cls");
    printf("入驻的商家如下：\n");
    printf("\t\t\t\t-------------------------------------------\n");
    printf("\t\t\t\t店铺名称\t店铺电话\t店铺地址\n");
    printf("\t\t\t\t-------------------------------------------\n");
    while(p)
    {
        printf("\t\t\t\t%8s\t%8s\t%7s\n",p->name,p->phone,p->address);
        printf("\t\t\t\t-------------------------------------------\n");
        p=p->next;
    }
    for(u =Ls->next; u != NULL;u = u->next)  
        n++;
    printf("\t\t\t\t合计\t\t\t\t%d个\n",n);
    printf("\t\t\t\t-------------------------------------------\n");
}
void Outputfood(link_food LF)
{
    food *s;
    s=LF->next;
    int sum=0;
    printf("订单如下：\n");
    printf("\t----------------------------------------------------------------------------------------------------\n");
    printf("\t菜名\t\t数量/份\t\t单价/元\t\t总价/元\t\t店铺\t\t订单号\t\t用户名\n"); 
    printf("\t----------------------------------------------------------------------------------------------------\n");
    for(s=LF->next;s!=NULL;s=s->next)
    {
        if(strcmp(s->yonghu,yh)==0)
        {
            printf("\t%-8s\t%-8d\t%-8d\t%-8d\t%-10s\t%-10d\t%s\n",s->name,s->amount,s->price,s->total,s->shop,s->type,s->yonghu);
            printf("\t----------------------------------------------------------------------------------------------------\n");
            sum=sum+s->total;
        }
    }
    printf("\t累计输出/元\t\t\t\t\t\t\t%d\n",sum);
    printf("\t----------------------------------------------------------------------------------------------------\n");
    if(sum==0)
    {  
        printf("○   您还没有订单呢，快去购买吧  φ(>ω<*) ");
        printf("\n\t\t\t\t\t->");
        Sleep(1000);
        printf("->");
        Sleep(1000);
        printf("->");
        Sleep(1000);
        system("cls");
        MENU2();
        return;
    }
}
void outputfood(link_food LF)
{
    food *p;
    p=LF->next;
    printf("\n\t\t\t                 菜       谱                        "); 
    printf("\n\t\t\t--------------------------------------------------\n");
    printf("\t\t\t菜名        菜价         店铺           菜系\n"); 
    printf("\t\t\t---------------------------------------------------\n");
    while(p)
    {
        printf("\t\t\t%-13s%-12d%-14s%s\n",p->name,p->price,p->shop,p->leibie);
        printf("\t\t\t---------------------------------------------------\n");
        p=p->next;
    }
}
//充值
user* addmoney(user *u)
{
    int n;
    char y;
    char a[20];
    FILE *fp;
    link_money LY;
    money *p,*r;
    printf("您账户里的余额为：%d",u->score);
    printf("是否充值？Y/else");
    fflush(stdin);//清除缓存 
    y=getchar();
    if(y=='Y')
    {
        fp=fopen("yue.txt","rt");
        LY=r=(money *)malloc(sizeof(money));
        LY->next=NULL;
        while(!feof(fp))
        {
            p=(money *)malloc(sizeof(money));
            fscanf(fp,"%s %s %s\n",p->person,p->card,p->mima);
            p->next=NULL;
            r->next=p;
            r=p; 
        }       
        fclose(fp);
        p=LY->next;
        while(1)
        {
            if(strcmp(yh,p->person)==0)
            {
                break;
            }
            else
                p=p->next; 
        }
        printf("充值的钱数？");
        scanf("%d",&n);
        printf("请输入支付密码：");
        scanf("%s",a);
        if(strcmp(p->mima,a)==0)
        {
            u->score=(u->score+n); 
            printf("已充值");
        } 
        else
            printf("\t\t×   密码错误，充值失败");
    }
    else
        printf("已放弃充值");
    return u; 
}                   
//按工号排序
void name_sort(link_shop LS)  
{  
    int i,j,n;  
    n = 0;  //记录店铺总数；
    shop *u,*q,*p;
    for(u =LS->next; u != NULL;u = u->next)  
        n++;  
//采用冒泡法对各个节点按姓名升序
    for(i=1;i<=n;i++)  
    {  
        u =LS;  
        for(j=0;j<n-i;j++)  
        {  
            p = u->next;  
            q = p->next;  
            if(strcmp(p->name,q->name) > 0 || strcmp(p->name,q->name) == 0)  
            {  
                u->next = q;  
                p->next = q->next;  
                q->next = p;  
            }  
            u = u->next;  
        }  
    } 
    printf("\t排序后店铺信息\n");
    Outputshop(LS);
    return;
}
void address_sort(link_shop LS)  
{  
    int i,j,n;  
    n = 0;  //记录店铺总数；
    shop *u,*q,*p;
    for(u =LS->next; u != NULL;u = u->next)  
        n++;  
//采用冒泡法对各个节点按地址升序
    for(i=1;i<=n;i++)  
    {  
        u =LS;  
        for(j=0;j<n-i;j++)  
        {  
            p = u->next;  
            q = p->next;
            if(strcmp(p->address,q->address) > 0 || strcmp(p->address,q->address) == 0)  
            {  
                u->next = q;  
                p->next = q->next;  
                q->next = p;  
            }  
            u = u->next;  
        }  
    } 
    printf("\t\t\t\t地址排序后店铺信息\n");
    Outputshop(LS);
    return;
}
void dingdan_name_sort(link_food LF)  //按订单食物名称排序 
{  
    int i,j,n;  
    n = 0;  //记录店铺总数；
    food *u,*q,*p;
    for(u =LF->next; u != NULL;u = u->next)  
        n++;  
//采用冒泡法对各个节点按姓名升序
    for(i=1;i<=n;i++)  
    {  
        u =LF;  
        for(j=0;j<n-i;j++)  
        {  
            p = u->next;  
            q = p->next;  
            if(strcmp(p->name,q->name) > 0 || strcmp(p->name,q->name) == 0)  
            {  
                u->next = q;  
                p->next = q->next;  
                q->next = p;  
            }  
            u = u->next;  
        }  
    } 
    Outputfood(LF);
    return;
}
void dingdan_total_sort(link_food LF)  //按订单总价从高到低排序 
{  
    int i,j,n;  
    n = 0;  //记录店铺总数；
    food *u,*q,*p;
    for(u =LF->next; u != NULL;u = u->next)  
        n++;  
//采用冒泡法对各个节点按姓名升序
    for(i=1;i<=n;i++)  
    {  
        u =LF;  
        for(j=0;j<n-i;j++)  
        {  
            p = u->next;  
            q = p->next;  
            if(p->total>q->total)  
            {  
                u->next = q;  
                p->next = q->next;  
                q->next = p;  
            }  
            u = u->next;  
        }  
    } 
    Outputfood(LF);
    return;
}
void dingdandelete(link_food Lf)
{
    food *p,*n;
    p=Lf;
    n=p->next;
    int m;
    char a;
    printf("请输入你所想删除的订单序号：");
    scanf("%d",&m);
    while(n)
    {
        if(m==n->type)
        {
            if(strcmp(n->shop,dp)==0)
            {
                p->next=n->next;
                //foodwrite(Lf);
                dingdanwrite(Lf);
                break; 
            }
            else
                printf("不好意思，您没有权限删除\n");
            break;
        }
        else
        {
            p=p->next;
            n=n->next;
        }
    }
}
food *dingdanread()
{
    FILE *fp;
    link_food LF,r,s;
    fp=fopen("dingdan.txt","rt");
    if(fp==NULL)
    { 
        printf("查看订单失败");
        return 0;
    }
    LF=r=(food *)malloc(sizeof(food));
    r->next=NULL;
    while(!feof(fp))
    {
        s=(food *)malloc(sizeof(food)); 
        fscanf(fp,"%s %d %d %d %s %d %s\n",s->name,&s->amount,&s->price,&s->total,s->shop,&s->type,s->yonghu);
        r->next=s;
        s->next=NULL;
        r=s;
    }
    return LF;
}
void scorefind(link_food LF)
{
    int sum=0;
    food *p;
    p=LF->next;
    system("cls"); 
    printf("\n\n\n\t\t\t产生的订单如下:\n");
    printf("      ----------------------------------------------------------------------------------------------------\n");
    printf("      菜品名称 \t菜品数量\t菜品单价\t菜品总价\t店铺名称\t订单号 \t\t用户名\n");
    printf("      ----------------------------------------------------------------------------------------------------\n");
    while(p)
    {
        if(strcmp(p->shop,dp)==0)
        {
        printf("    %7s%14d%15d%16d%16s%15d%18s\n",p->name,p->amount,p->price,p->total,p->shop,p->type,p->yonghu);
        printf("      ----------------------------------------------------------------------------------------------------\n");
        sum=sum+p->total;
        }
        p=p->next;
    }
    printf("      合计/元：\t\t\t\t\t\t\t累计收入%d\n",sum);
    printf("      ----------------------------------------------------------------------------------------------------\n");
    if(sum==0)
        printf("\t\t●   您店里的菜还没有人购买哦，应该反思啦\n");
}
food * foodread()//读取 
{
    link_food LF;
    food *s,*r;
    LF=r=(food *)malloc(sizeof(food));
    LF->next=NULL;
    FILE *fp;
    fp=fopen("food.txt","rt");
    if(fp==NULL)
    {
        printf("不能打开此文件");
        exit(1); 
    }
    while(!feof(fp))//判断文件指针是否处于文件结束位置，若是，返回1，非，返回0 
    {
        s=(food *)malloc(sizeof(food)); 
        fscanf(fp,"%s %d %s %s\n",s->name,&s->price,s->shop,s->leibie);
        r->next=s;
        s->next=NULL;
        r=s;
    }
    fclose(fp);
    return LF;  
 }
money * moneyread()//读取 
{
    link_money LM;
    money *s,*r;
    LM=r=(money *)malloc(sizeof(money));
    LM->next=NULL;
    FILE *fp;
    fp=fopen("yue.txt","rt");
    if(fp==NULL)
    {
        printf("不能打开此文件");
        exit(1); 
    }
    while(!feof(fp))//判断文件指针是否处于文件结束位置，若是，返回1，非，返回0 
    {
        s=(money *)malloc(sizeof(money));   
        fscanf(fp,"%s %s %s\n",s->person,s->card,s->mima);
        r->next=s;
        s->next=NULL;
        r=s;
    }
    fclose(fp);
    return LM;  
 }
shop * shopread()
{
    link_shop LS;
    shop *s,*r;
    LS=r=(shop *)malloc(sizeof(shop));
    r->next=NULL;
    FILE *fp;
    fp=fopen("shop.txt","rt");
    if(fp==NULL)
    {
        printf("不能打开此文件");
        exit(1); 
    }
    while(!feof(fp))//判断文件指针是否处于文件结束位置，若是，返回1，非，返回0 
    {
        s=(shop *)malloc(sizeof(shop));
        s->next=NULL;
        fscanf(fp,"%s %s %s %s\n",s->name,s->phone,s->address,s->password);
        r->next=s;
        r=s;
    }
    fclose(fp);
    return LS;  
 }
user * userread()
{
    link_user LU;
    user *s,*r;
    LU=r=(user *)malloc(sizeof(user));
    r->next=NULL;
    FILE *fp;
    fp=fopen("users.txt","rt");
    if(fp==NULL)
    {
        printf("不能打开此文件");
        exit(1); 
    }
    while(!feof(fp))//判断文件指针是否处于文件结束位置，若是，返回1，非，返回0 
    {
        s=(user *)malloc(sizeof(user));
        s->next=NULL;
        fscanf(fp,"%s %s %s %s %d\n",s->name,s->delivery,s->password,s->number,&s->score);
        r->next=s;
        r=s;
    }
    fclose(fp);
    return LU;  
 } 
void deleteshop(link_shop LS)
{
    int i=0;
    shop *p,*q;
    p=LS;
    q=p->next;
    char m[20];
    char a;
    printf("请输入你所想删除的店铺名称或者电话：");
    scanf("%s",m);
    while(q)
    {
        if(strcmp(m,q->name)==0||strcmp(m,q->phone)==0)
        {
            i++;
            p->next=q->next;
            shopwrite1(LS);
            return;
        }
        else
        {
            p=p->next;
            q=q->next;
        }
    }
    if(i==0)
    {
        printf("没有此店铺，无法删除\n");
        return;
    }
}
void deletedingdan(link_food Lf)
{
    food *p,*n;
    p=Lf;
    n=p->next;
    int m,i=0;
    char a;
    printf("请输入你所想删除的订单号：");
    scanf("%d",&m);
    while(n)
    {
        if(n->type==m)
        {
            if(strcmp(n->yonghu,yh)==0)
            {
                p->next=n->next;
                i++;
                foodwrite(Lf);
            }
            else
                printf("不好意思，您没有权限删除\n");
            break;
        }
        else
        {
            p=p->next;
            n=n->next;  
        }
    }
    if(i==0)
    {
        printf("\t没有此订单，无法删除\n");
        return;
    }
}
void purchase()
{
    link_food Lf;
    money *LM,*mo;
    user *lu,*us;
    FILE *fp;
    char a[20],b[20],mi[20];
    char y;
    int i=0;
    printf("\t\t◇您想吃啥呢？");
    scanf("%s",a);
    Lf=foodread();
    food *p;
    p=Lf->next;
    srand((unsigned)time(NULL));//订单号的种子 
    while(p!=NULL)
    {
        if(strcmp(p->name,a)==0||strcmp(p->leibie,a)==0)
        {
        //  printf("%s\t%d\t%s\n",p->name,p->price,p->shop);
            i++;
        }   
        p=p->next;  
    }
    if(i==0)
    {
        printf("\t\t\t×不好意思，还没有此菜呢\n");
        system("pause");
        system("cls");
        MENU2();
        return; 
    }
    else
    {
        p=Lf->next;
        printf("\n\t\t\t--------------------------------------------------\n");
        printf("\t\t\t菜名        菜价         店铺           菜系\n"); 
        printf("\t\t\t---------------------------------------------------\n");
        while(p)
        {
            if(strcmp(p->leibie,a)==0||strcmp(p->name,a)==0)
            {
                printf("\t\t\t%-13s%-12d%-14s%s\n",p->name,p->price,p->shop,p->leibie);
                printf("\t\t\t---------------------------------------------------\n");
            }

            p=p->next;
        }
    }
    printf("\t\t◇请输入要购买的店铺：");
    scanf("%s",b);
    lu=userread();
    us=lu->next;
    while(us)
    {
        if(strcmp(yh,us->name)==0)
            break;
        else
            us=us->next;
    }//找出要购买的用户信息 
    LM=moneyread();
    mo=LM->next;
    i=0;
    while(mo)
    {
        if(strcmp(yh,mo->person)==0)
        {
            i++;
            break;
        }

        else
            mo=mo->next;
    }//找出用户的银行卡信息 
    if(i==0)
    {
        printf("\t\t×   您还没有绑定银行卡哦，不能购买的");
        return; 
    }
    p=Lf->next;
    i=0;
    while(p)
    {
        if(strcmp(p->name,a)==0||strcmp(p->leibie,a)==0)
        {
            if(strcmp(p->shop,b)==0)
            {
                printf("\t\t◇请输入要购买的数量");
                scanf("%d",&p->amount);
                if(p->amount!=0)
                {
                    i++;
                    p->total=(p->amount)*(p->price);
                    p->type=rand()%900+100;
                    if((us->score)<p->total)
                    {
                        printf("\t\t×   您的账号余额不足，请先充值\n");
                        system("pause");
                        system("cls");
                        MENU2();
                        return;
                    }
                    printf("\t\t●确认购买？Y/else");
                    fflush(stdin);
                    y=getchar();
                    if(y=='Y')
                    {
                        printf("请输入支付密码:");
                        scanf("%s",mi);
                        if(strcmp(mi,mo->mima)==0)
                        {
                            fp=fopen("dingdan.txt","at");
                            if(fp==NULL)
                                printf("\t\t\t\t×购买失败\n");//因文件无法打开而失败
                            else
                            {
                                fprintf(fp,"%s %d %d %d %s %d %s\n",p->name,p->amount,p->price,p->total,p->shop,p->type,yh);
                                fclose(fp);
                                us->score=(us->score)-(p->total);
                                user_moneywrite(lu);
                                printf("\t\t\t\t√购买成功，请耐心等待配送\n");
                                start = time(NULL);//计时 
                                system("pause");
                                system("cls");
                                MENU2();
                                return;
                            }       
                        }
                        else
                        {
                            printf("\t\t×   密码错误，购买失败");
                            system("pause");
                            system("cls");
                            MENU2();
                            return;  
                        }        
                    } 
                    else
                    {
                        printf("\t\t\t×已放弃购买");
                        system("pause");
                        system("cls");
                        MENU2();
                        return; 
                    }
                }
                else
                {
                    printf("\t\t\t×请输入正确的数量");
                    system("pause");
                    system("cls");
                    MENU2();
                    return; 
                }
            }
        }
        p=p->next;
    }
    if(i==0)
    {
        printf("\t\t×请输入表中的店铺名称哦\n");
        system("pause");
        system("cls");
        MENU2(); 
    }
}
void foodwrite(link_food LF)//保存 
 {
    FILE *fp;
    food *p;
    char a;
    printf("确认保存？(Y/else)");
    scanf("%*c%c",&a);
    if(a=='Y')
    {
        fp=fopen("food.txt","at");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LF->next;p!=NULL;p=p->next)
            fprintf(fp,"%s %d %s %s\n",p->name,p->price,dp,p->leibie);
        printf("修改成功\n");
        fclose(fp);
        return;
    }
    else
        printf("已放弃修改");
 }
 void foodwrite1(link_food LF)
 {
    FILE *fp;
    food *p;
    char a;
    printf("确认保存？(Y/else)");
    scanf("%*c%c",&a);
    if(a=='Y')
    {
        fp=fopen("food.txt","wt");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LF->next;p!=NULL;p=p->next)
            fprintf(fp,"%s %d %s %s\n",p->name,p->price,p->shop,p->leibie);
        printf("修改成功\n");
        fclose(fp);
        return;
    }
    else
        printf("已放弃修改");
 }
// void foodwrite2(link_food LF)
// {
//  FILE *fp;
//  food *p;
//  char a;
//  printf("确认保存？(Y/else)");
//  scanf("%*c%c",&a);
//  if(a=='Y')
//  {
//      fp=fopen("food.txt","wt");
//      if(fp==NULL)
//          printf("错误！无法打开");
//      for(p=LF->next;p!=NULL;p=p->next)
//          fprintf(fp,"%s %d %s %s\n",p->name,p->price,p->shop,p->leibie);
//      printf("修改成功\n");
//      fclose(fp);
//      return;
//  }
//  else
//      printf("已放弃修改");
// }
 void dingdanwrite(link_food LF)
 {
    FILE *fp;
    food *p;
    char a;
    printf("确认保存？(Y/else)");
    scanf("%*c%c",&a);
    if(a=='Y')
    {
        fp=fopen("dingdan.txt","wt");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LF->next;p!=NULL;p=p->next)
            fprintf(fp,"%s %d %d %d %s %d %s\n",p->name,p->amount,p->price,p->total,p->shop,p->type,p->yonghu);
        printf("修改成功\n");
        fclose(fp);
        return;
    }
    else
        printf("已放弃修改"); 
 }
void shopwrite1(link_shop LS)
 {
    FILE *fp;
    shop *p;
    char a;
    printf("确认保存？(Y/else)");
    scanf("%*c%c",&a);
    if(a=='Y')
    {
        fp=fopen("shop.txt","wt");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LS->next;p!=NULL;p=p->next)
            fprintf(fp,"%s %s %s %s\n",p->name,p->phone,p->address,p->password);
        printf("保存成功\n");
        fclose(fp);
        return;
    }
    else
        printf("已放弃");
 }
 void shopwrite2(link_shop LS)
 {
    FILE *fp;
    shop *p;
    char a;
    printf("是否将信息保存至文件里？(Y/else)");
    scanf("%*c%c",&a);
    if(a=='Y')
    {
        fp=fopen("shop.txt","at");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LS->next;p!=NULL;p=p->next)
        fprintf(fp,"%s %s %s\n",p->name,p->phone,p->address);
        printf("修改成功\n");
        fclose(fp);
        return;
    }
    else
        printf("已放弃修改");

 }
 void userwrite(link_user LU)
 {
    FILE *fp;
    user *p;
    char a;
//  printf("请确认？(Y/else)");
//  scanf("%*c%c",&a);
//  if(a=='Y')
//  {
        fp=fopen("users.txt","wt");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LU->next;p!=NULL;p=p->next)
            fprintf(fp,"%s %s %s %s %d\n",p->name,p->delivery,p->password,p->number,p->score);
        printf("操作成功\n");
        fclose(fp);
        return;
//  }
    //else
        //printf("已放弃注册");
 }
 void user_moneywrite(link_user LM)
 {
    FILE *fp;
    user *p;
    char a;
//  printf("是否将信息保存至文件里？(Y/else)");
//  scanf("%*c%c",&a);
//  if(a=='Y')
//  {
        fp=fopen("users.txt","wt");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LM->next;p!=NULL;p=p->next)
            fprintf(fp,"%s %s %s %s %d\n",p->name,p->delivery,p->password,p->number,p->score);
        //printf("注册成功\n");
        fclose(fp);
        //return;
//  }
    //else
        //printf("已放弃注册");
 }
 void userwrite2(link_user LU)
 {
    FILE *fp;
    user *p;
    char a;
    printf("是否将信息保存至文件里？(Y/else)");
    scanf("%*c%c",&a);
    if(a=='Y')
    {
        fp=fopen("users.txt","at");
        if(fp==NULL)
            printf("错误！无法打开");
        for(p=LU->next;p!=NULL;p=p->next)
            fprintf(fp,"%s %s %s %s %d\n",p->name,p->delivery,p->password,p->number,p->score);
        printf("注册成功\n");
        fclose(fp);
        return;
    }
    else
        printf("已放弃注册");
 }
void increaseshop(link_shop LS)
{
    char a[30],b[20],c[15],d[20];
    shop *s;
    printf("请输入你所想加入的店铺信息：\n");
    printf("\t\t●    店铺名称：");
    scanf("%s",a);
    printf("\n\t\t●    店铺电话：");
    scanf("%s",b);
    printf("\n\t\t●    店铺地址：");  
    scanf("%s",c);
    printf("\n\t\t●    店铺密码：");  
    scanf("%s",d);
    if(strcmp(a,"0")!=0)
    {
        s=(shop *)malloc(sizeof(shop));
        strcpy(s->name,a);
        strcpy(s->phone,b);
        strcpy(s->address,c);
        strcpy(s->password,d);
    }
    s->next=LS->next;
    LS->next=s; 
    shopwrite1(LS);
 }
void shopfind(link_shop LS)
{ 
    shop *p;
    char E[20];
    p=LS->next;
    printf("请输入店铺的名称：");
    scanf("%s",E); 
    while(strcmp(p->name,E)!=0&&(p->next)!=NULL)
    {
        p=p->next;
    }
    if((p->next)==NULL)
    {
        printf("没有此店铺");
        return;
    }    
    printf("您所查询的店铺信息为：\n名称\t电话\t地址\n");
    printf("%s %s %s",p->name,p->phone,p->address);
} 
void registerdeal()
{
    int q;
    FILE *fp;
    char y;
    link_shop head;
    shop *r,*p;
    head=r=(shop *)malloc(sizeof(shop));
    r->next=NULL;
    fp=fopen("shenqing.txt","rt");
    if(fp==NULL)
    {
        printf("发生错误，无法打开文件");
        return; 
    }
    if((y=fgetc(fp))==EOF)
    {
        printf("目前没有需要处理的信息\n");
        system("pause");
        system("cls");
        MENU1();
        return;
    }
    else
    {
        while(!feof(fp))
        {
            p=(shop *)malloc(sizeof(shop));
            fscanf(fp," %s %s %s %s \n",p->name,p->phone,p->address,p->password);
            r->next=p;
            p->next=NULL;
            r=p;
        }
        for(p=head->next;p!=NULL;p=p->next)
            printf("%s %s %s\n",p->name,p->phone,p->address); 
        printf("是否同意注册？Y/else");
        scanf("%*c%c",&y); 
        if(y=='Y')
        {
            fp=fopen("shop.txt","at");
            if(fp==NULL)
                printf("文件不存在，打开错误\n"); 
            for(p=head->next;p!=NULL;p=p->next)
                fprintf(fp,"% s %s %s %s \n",p->name,p->phone,p->address,p->password);
            fclose(fp);
        } 

    } 
    printf("处理成功"); 
    fp=fopen("shenqing.txt","wt");
    fclose(fp);
}
void MENU1_choose()
{
    int n,m,q;
    char a[20],b[20],c[20],d[20];
    char y;
    FILE *fp,*fa;
    shop *p;
    shop sq;
    link_shop LS;
    link_user LU;
    LS=shopread();
    while(1)
    {
        printf("请选择你想所想进行的选项:\n"); 
        scanf("%d",&n);
        if(n==1)
        {
            Outputshop(LS);
            printf("是否进行排序？Y/else");
            fflush(stdin);
            y=getchar();
            if(y=='Y')
            {
                system("cls");
                printf("\n\n\n\t\t\t●1.按店铺名称排序\n");
                printf("\t\t\t●2.按店铺地址排序\n");
                scanf("%d",&m);
                if(m==1)
                    name_sort(LS);
                if(m==2)
                    address_sort(LS);
                printf("1.退出\t2.返回");
                scanf("%d",&m);
                if(m==1)
                    exit(0);
                else
                {
                    system("cls");
                    MENU1();
                    continue;
                } 
            }
            else
            {
                printf("已放弃排序\n");
                system("cls");
                MENU1();
            }

        }
        if(n==2)
        {
            system("cls");
            printf("\n\n\n\t\t\t☆【1】删除店铺\n");
            printf("\t\t\t☆【2】增加店铺\n");
            printf("\t\t\t☆【3】输入店铺\n");
            printf("\t\t\t☆【0】返回上一级\n");
            printf("\n\t\t请选择将要进行的操作：\n"); //二级 
            while(1)
            {
                scanf("%d",&m);
                if(m==1)
                    deleteshop(LS);
                if(m==2)
                    increaseshop(LS);
                if(m==3)
                { 
                    LS=creats();
                    shopwrite1(LS);
                }
                if(m==4)
                    shopfind(LS);   
                if(m==0)
                {
                    system("cls");
                    MENU1();
                    break;
                } 
            }       
        }
        if(n==3)
            registerdeal();//注册处理以及投诉处理函数 
        if(n==4)
        {
            //LU=userread();
            system("cls");
            printf("\n\t请选择所想进行的选项：\n\n");
            printf("\t● ○ ● ○ ● ○  ●\n");
            printf("\t   1.查看个人信息    \n");
            printf("\t○ 2.修改个人信息  ○\n");
            printf("\t   0.返回上一级      \n");//二级 
            printf("\t● ○ ● ○ ● ○  ●\n");
            while(1)
            {
                scanf("%d",&m);
                if(m==1)
                {
                    char d[20];
                    fa=fopen("admin.txt","rt");
                    fscanf(fa,"%s %s %s %s",a,b,c,d);
                    fclose(fa);
                    printf("\n\t\t地区\t姓名\t电话号码\n");
                    printf("\t\t%s\t%s\t%s\n",a,b,d);
                }
                if(m==2)
                {
                    system("cls");
                    printf("\n                                                          温馨提示，按0返回哦(〃'▽'〃)\n"); 
                    printf("\n\t\t● ○ ● ○ ● ○  ●\n");
                    printf("\t\t     1.修改姓名      \n");
                    printf("\t\t○   2.修改地址    ○\n");
                    printf("\t\t     3.修改密码      \n");//三级 
                    printf("\t\t● ○ ● ○ ● ○  ●\n");
                    scanf("%d",&q); 
                    if(q==1)
                    {
                        printf("请输入新的姓名：\n");
                        scanf("%s",b);
                    }
                    if(q==2)
                    {
                        printf("请输新的地址：\n");
                        scanf("%s",a); 
                    } 
                    if(q==3)//修改密码，含找回密码 
                    {
                        int j=0,h; 
                        char f[20],e[20];
                        fa=fopen("admin.txt","rt");
                        fscanf(fa,"%s %s %s %s",a,b,c,d);
                        printf("您需要输入旧的密码：\n");
                        scanf("%s",f);
                        while(strcmp(f,c)!=0)
                        {
                            j++; 
                            printf("\t\t×您的密码有误,请重新输入：");
                            scanf("%s",f);
                            if(j==2)
                            {
                                printf("\t\t×您已经连续输错三次，按1找回密码，其他数字键返回:");
                                scanf("%d",&j);
                                if(j==1)
                                {
                                    printf("请输入您的电话号码:");
                                    scanf("%s",e);
                                    if(strcmp(e,d)==0)
                                    {
                                        srand((unsigned)time(NULL));
                                        j=rand()%900+100;
                                        fp=fopen("yanzheng.txt","wt");
                                        //fscanf(fp,"%d\n",&j);
                                        fprintf(fp,"%d\n",j);
                                        fclose(fp);
                                        printf("我们已经发送验证码到您的手机，请输入:");
                                        scanf("%d",&h);
                                        if(h==j)
                                        {
                                            printf("\t\t√请重新设置您的密码:");
                                            scanf("%s",c);
                                            break; 
                                        }
                                        else
                                        {
                                            printf("\t\t×验证码错误\n");
                                            break; 
                                        }
                                    }
                                    else
                                    {
                                        printf("\t\t×找回密码失败\n");
                                        break; 
                                    }
                                }
                                else
                                {
                                    system("cls");
                                    MENU();
                                    return; 
                                }

                            }
                        }
                        if(strcmp(c,f)==0)
                        {
                            printf("请输入新的密码：\n");
                            scanf("%s",c);
                        }
                    }
                    if(q==1||q==2||q==3)
                    {
                        printf("是否保存？Y/else");
                        fflush(stdin);
                        y=getchar();
                        if(y=='Y')
                        {
                            fa=fopen("admin.txt","wt");
                            fprintf(fa,"%s %s %s %s",a,b,c,d);
                            fclose(fa);
                            printf("\t\t√保存成功"); 
                        }
                        else
                            printf("\t\t×已放弃修改");
                        system("pause");
                        system("cls");
                        printf("\n\t请选择所想进行的选项：\n\n");
                        printf("\t● ○ ● ○ ● ○  ●\n");
                        printf("\t   1.查看个人信息    \n");
                        printf("\t○ 2.修改个人信息  ○\n");
                        printf("\t   0.返回上一级      \n");//二级 
                        printf("\t● ○ ● ○ ● ○  ●\n");
                        continue; 
                    }
                    if(q==0)
                    {
                        system("cls");
                        printf("\n\t请选择所想进行的选项：\n\n");
                        printf("\t● ○ ● ○ ● ○  ●\n");
                        printf("\t   1.查看个人信息    \n");
                        printf("\t○ 2.修改个人信息  ○\n");
                        printf("\t   0.返回上一级      \n");//二级 
                        printf("\t● ○ ● ○ ● ○  ●\n");
                        continue;
                    }
                }
                if(m==0) 
                {
                    system("cls");
                    MENU1();
                    break;
                } 
            } 
        }
        if(n==5)
        {
            system("cls");
            MENU1();
        }
        if(n==0)
        {
            system("cls");
            MENU();
            break;
        }
        if(n!=1&&n!=2&&n!=3&&n!=4&&n!=5&&n!=0)
        {
            printf("\t\t∷");
            Sleep(400);
            printf("∷");
            Sleep(400);
            printf("∷");
            Sleep(400);
            printf("您需要输入菜单上的数字哦\n"); 
        }   
    }
}
void MENU2_choose()
{
    int n,m,q,i=0;
    char a[20],b[20];
    char y;
    FILE *fp;
    user *u;
    food *p,*s,*r;
    link_food LF,Lf;
    LF=foodread();
    link_user LU;
//  user user;
    while(1)
    {
        scanf("%d",&n);
        switch(n)
        {
            case 1:
                    system("cls");
                    printf("\n\n\t\t\t请选择需要进行的选项:\n\n");
                    printf("\t\t\t--------------------\n");
                    printf("\t\t\t    用 户 相 关\n");
                    printf("\t\t\t--------------------\n");
                    printf("\t\t\t●   1.修改用户名\n"); 
                    printf("\t\t\t●   2.修改密码\n"); 
                    printf("\t\t\t●   3.修改收货地址\n");
                    printf("\t\t\t●   4.修改电话号\n");
                    printf("\t\t\t●   5.查看个人信息\n");
                    printf("\t\t\t●   6.充值钱包\n");
                    printf("\t\t\t●   0.返回上一级\n");
                    LU=userread();
                    u=LU->next;
                    while(1)
                    {
                        if(strcmp(yh,u->name)==0)
                            break;
                        else
                            u=u->next;
                    }
                    while(1)
                    {
                        scanf("%d",&m);
                        if(m==1)
                        {
                            printf("请输入新的用户名：\n");
                            scanf("%s",u->name);
                        }
                        if(m==2)
                        {
                            printf("您需要输入旧的密码：\n");
                            scanf("%s",b);
                            while(strcmp(u->password,b)!=0)
                            {
                                printf("密码错误，请重新输入\n");

                                scanf("%s",b);
                                i++;
                                if(i==2)
                                {
                                    printf("您已经输错三次，请5分钟后再试");
                                    continue; 
                                }
                            }
                            printf("请输入新的密码：");
                            scanf("%s",u->password); 
                        }
                        if(m==3)
                        {
                            printf("请输入新的收货地址：");
                            scanf("%s",u->delivery); 
                        }
                        if(m==4)
                        { 
                            printf("请输入新的收货地址");
                            scanf("%s",u->number);
                        }
                        if(m==1||m==2||m==3||m==4)
                            userwrite(LU);
                        if(m==5)
                        {
                            printf("您的信息为：\n");
                            printf("姓名\t收获地址\t联系方式\n"); 
                            printf("%s\t%s\t%s\n",u->name,u->delivery,u->number);
                        }
                        if(m==6)
                        {
                            u=addmoney(u);
                            userwrite(LU); 
                        }
                        if(m==0)
                        {
                            system("cls");
                            MENU2(); 
                            break;
                        }

                    } 
                    break;
            case 2:
                LF=dingdanread();
                Outputfood(LF);  
                break;
            case 3:
                LF=foodread();
                system("cls");
                outputfood(LF);
                p=LF->next; 
                printf("\t●   按1购买，其他数字返回\t");
                scanf("%d",&q);
                if(q==1)
                {
                    purchase();
                }
                else
                {
                    system("cls");
                    MENU2();
                    continue;
                }
                break;
            case 4:
                LF=dingdanread();
                p=LF->next;
                i=0;         
                printf("请输入所想修改的订单号：");
                scanf("%d",&n);
                while(p)
                {
                    if(n==p->type)
                    {
                        if(strcmp(p->yonghu,yh)==0)
                        {
                            i=1; 
                            system("cls");
                            printf("\n订单信息如下：\n"); 
                            printf("\t菜名\t单价\t数量\t总价\t店铺\t用户名\t\n");
                            printf("\t%s\t%d\t%d\t%d\t%s\t%s\n\n",p->name,p->price,p->amount,p->total,p->shop,p->yonghu); 
                            printf("\t\t○   1.修改数量\n");
                            printf("\t\t○   2.删除订单\n");
                            printf("\t\t○   其他数字键返回\n"); 
                            scanf("%d",&n);
                            if(n==1)
                            {
                                end = time(NULL);
                                if((difftime(end,start))<180)
                                {
                                    printf("还没有超过三分钟，请尽快修改哦\n"); 
                                    printf("您只能修改菜的数量:");
                                    scanf("%d",&m);
                                    p->amount=m;
                                    p->total=(p->amount)*(p->price);
                                    dingdanwrite(LF);
                                    printf("\t\t√已成功修改");
                                }
                                else
                                {
                                    printf("时间超过三分钟，已配送\n");
                                    system("pause");
                                    system("cls");
                                    MENU2(); 
                                    break;
                                }
                            }
                            if(n==2)
                            {
                                deletedingdan(LF);
                                dingdanwrite(LF); 
                            }
                            else
                            {
                                system("pause");
                                system("cls");
                                MENU2();
                                break;
                            }
                        }
                        if(strcmp(p->yonghu,yh)!=0)
                        {
                            printf("\t\t×   不好意思，该订单您没有权限修改\n");
                            i=2;
                            system("pause");  
                            system("cls");
                            MENU2(); 
                            break;
                        }
                    }
                    else
                        p=p->next;
                }   
                if(i==0)
                {
                    printf("\t\t×没有改订单\n");
                    system("pause");
                    system("cls");
                    MENU2();
                    continue;
                }   
                break; 
            case 5:
                purchase();
                break;
            case 6:
                system("cls");
                printf("\n\n\n\t\t\t---------------\n");
                printf("\t\t\t  订 单 排 序\n");
                printf("\t\t\t---------------\n"); 
                printf("\t\t\t△ 1.按菜名排序：\n");
                printf("\t\t\t△ 2.按总价排序：\n");
                printf("\t\t\t△ 0.返回\n");
                scanf("%d",&m);
                {
                    LF=dingdanread();
                    if(m==1)
                        dingdan_name_sort(LF);
                    if(m==2)
                        dingdan_total_sort(LF);
                    if(m==0)
                    {
                        system("cls");
                        MENU2();
                        continue;
                    }
                    system("pause");
                    system("cls");
                    MENU2();
                    continue;

                }
                break;
                //dindan_name_sort(LF);
            case 0:
                system("cls");
                MENU();
                return;
                break;
            }
        }
}
void deletefood(link_food Lf)
{
    int i=0;
    food *p,*n;
    p=Lf;
    n=p->next;
    char m[20];
    char a;
    printf("请输入你所想删除的菜名：");
    scanf("%s",m);
    while(n)
    {
        if(strcmp(m,n->name)==0)
        {
            if(strcmp(n->shop,dp)==0)
            {
                i++;
                p->next=n->next;
                foodwrite1(Lf);
            }
            else

                printf("不好意思，您没有权限删除\n");
            break;
        }
        else
        {
            p=p->next;
            n=n->next;
        }
    }
    if(i==0)
    {
        printf("没有此菜，无法删除\n");
        return;
    }
}
void MENU3_choose()
{
    int x,y;
    char a[20];
    link_food LF,Lf;
    LF=foodread();
    food *p;
    while(1)
    {
        printf("请选择：");
        scanf("%d",&x);
        if(x==1)
        {
            creatf();
            //foodwrite(LF);
        }
        if(x==2)
        {
            int i=0;
            printf("请输入要修改的菜的名称：");
            scanf("%s",a);
            //LF=foodread();
            p=LF->next;
            while(p!=NULL)
            {
                if(strcmp(a,p->name)==0)
                {
                    i++;
                    if(strcmp(dp,p->shop)==0)
                    {
                        printf("请重新输入菜的信息:\n");
                        printf("\t\t\t△新菜名：");
                        scanf("%s",p->name);
                        printf("\t\t\t△新菜价：");
                        scanf("%d",&p->price);
                        foodwrite1(LF); 
                    }
                    else
                        printf("不好意思，您没有权限修改\n");
                    break; 
                }
                p=p->next;
            }
            if(i==0)
                printf("\t\t×   没有此菜的信息\n"); 
        }
        if(x==3)
        {
            deletefood(LF);
        } 
        if(x==4)
        {
            int sum=0;
            Lf=foodread();
            p=Lf->next;
            system("cls");
            printf("\n\n\t\t您家的食物如下：");
            printf("\n\t\t----------------------------------------\n");
            printf("\t\t菜名\t     菜价\t店铺\t    菜系\n");
            printf("\t\t----------------------------------------\n"); 
            while(p)
            {
                if(strcmp(p->shop,dp)==0)
                {
                    printf("\t\t%-14s%-10d%-12s%s\n",p->name,p->price,p->shop,p->leibie);
                    printf("\t\t----------------------------------------\n");
                    sum=sum+1;
                }
                p=p->next;
            }
            printf("\t\t合计/个：\t\t\t%d个菜\n",sum);
            printf("\t\t----------------------------------------\n");
            if(sum==0)
                printf("\t\t\t●   怪不得没订单，您还没添加菜品呢\n");
            system("pause");
            system("cls");
            MENU3();
        }
        if(x==5)
        {
            LF=dingdanread();
            scorefind(LF);//查看业绩函数
            system("pause");
            system("cls");
            MENU3();
        }        
        if(x==0) 
        {
            system("cls");
            MENU();
            break;
        }   
    } 
}
//登陆
void login()
{
    int n,i=0,j=0;
    char a[10],c[10];
    char b[15],d[15],f[10],e[20];
    FILE *fp;
    char ch;
    system("cls"); 
    MENU();
    printf("请选择：");
    while(1)
    {
        scanf("%d",&n);
        //管理员登陆 
        if(n==1)
        {
            printf("请输入用户名:"); 
            scanf("%s",a);
            printf("请输入密码:");
            while((ch=getch())!=13){
            if(ch==8){
                printf("\b \b");
                i--;
                continue;
            }
            b[i++]=ch;
            putchar('*');
            }
            b[i]='\0';
            fp=fopen("admin.txt","rt");
                if(fp==NULL)
                    printf("没有此文件，无法打开");
            fscanf(fp,"%s %s %s %s",f,c,d,e);
            fclose(fp);
            while(strcmp(a,c)!=0||strcmp(b,d)!=0)
            {
                printf("\n账号或密码错误，请重新输入：\n");
                printf("请输入用户名：");
                scanf("%s",a);
                printf("请输入密码：");
                i=0;
                while((ch=getch())!=13){
                if(ch==8){
                    printf("\b \b");
                    i--;
                    continue;
                }
                b[i++]=ch;
                putchar('*');
                }
                b[i]='\0';
                j++;
                if(j==2)
                {
                    printf("\n密码错误已达三次,将自动退回主菜单\n");
                    system("pause"); 
                    system("cls");
                    MENU();
                    return;
                }
            }
            system("cls");
            //system("color 03");
            welcome();
            printf("\n");
            system("pause");
            system("cls");
            MENU1();
            MENU1_choose(); 
        }
    //用户登录 
        if(n==2)
        {
            link_user LU;
            user *p;
            LU=userread();
            p=LU->next;
            printf("请输入账号或名称");
            scanf("%s",yh);
            printf("请输入密码：");
            i=0;
            while((ch=getch())!=13){
            if(ch==8){
                printf("\b \b");
                i--;
                continue;
            }
            b[i++]=ch;
            putchar('*');
            }
            b[i]='\0';
            int i=0;
            while(p!=NULL)
            {
                if(strcmp(yh,p->name)==0&&strcmp(b,p->password)==0)
                {
                    system("cls");
                    //system("color 0a");
                    //welcome();
                    printf("\n");
                    system("pause");
                    system("cls");
                    i++;
                    MENU2();
                    MENU2_choose();
                    break;
                }
                p=p->next;
            }
            if(i==0)
            { 
                printf("密码或者账号错误\n");
                system("pause");
                system("cls");
                ME();
                return;
            }
        }
        if(n==3)
        {
            link_shop LS;
            shop *p;
            j=0;
            LS=shopread();
            p=LS->next;
            printf("请输入店铺名称或者账号：");
            scanf("%s",dp);
            printf("请输入密码");
            i=0;
            while((ch=getch())!=13)
            {
                if(ch==8)
                {
                    printf("\b \b");
                    i--;
                    continue;
                }       
                putchar('*');
                b[i++]=ch;
            }
            b[i]='\0';
            while(p!=NULL)
            {
                if(strcmp(dp,p->name)==0&&strcmp(b,p->password)==0)
                {
                    system("cls");
                    //system("color 0a");
                    //welcome();
                    j++;
                    printf("\n");
                    system("pause");
                    system("cls");
                    MENU3();
                    MENU3_choose();
                    break;
                }
                else
                    p=p->next;
            }
            if(j==0)
            { 
                printf("\t\t\n×   密码或者账号错误\n");
                system("pause");
                system("cls");
                ME();
                return;
            }
        }
        if(n==0)
        {
            system("cls");
            ME();
            break; 
        }   
    }
}
user * creatu()
{
    char a[30],b[20],c[15],d[20];
    char ca[20],mi1[20],mi2[20];
    link_user LU,lu;
    FILE *fp;
    user *s,*r,*p;
    int x,y,i,h; 
    LU=r=(user *)malloc(sizeof(user));
    LU->next=NULL;
    printf("请输入姓名：");
    scanf("%s",a);
    lu=userread();
    while(1)
    {
        i=0;
        p=lu->next;
        while(p)
        { 
            if(strcmp(a,p->name)==0)
            {
                i++;
                printf("\t\t×此用户已经有人注册过,请重新输入:");
                scanf("%s",a);
                break;
            }
            else
                p=p->next;
        }
        if(i==0)
            break;
    }
    printf("请输入收货地址：");
    scanf("%s",b); 
    printf("请输入密码：");
    scanf("%s",c);
    printf("请输入电话号码：");
    scanf("%s",d); 
    x=strlen(c);
    while(x<8)
    {
        printf("\t\t●   您的密码小于8位，安全指数为低\n");
        printf("按1修改,其他键放弃修改:");
        scanf("%d",&y);
        if(y==1)
        {
            scanf("%s",c);
            x=strlen(c);    
        }
        else
            break;  
    }
    if(strcmp(b,"0")!=0)
    {
        s=(user *)malloc(sizeof(user));
        s->score=0;
        strcpy(s->name,a);
        strcpy(s->delivery,b);
        strcpy(s->password,c);
        strcpy(s->number,d);
        r->next=s;
        s->next=NULL;
        r=s;
        printf("为了方便充值钱包，请绑定您的银行卡：");
        scanf("%s",ca);
        h=strlen(ca);
        while(h<15)
        {
            printf("\t\t●   您的银行卡不足15位，请重新输入：");
            scanf("%s",ca);
            h=strlen(ca); 
        }
        i=0; 
        printf("请设置您的支付密码");
        scanf("%s",mi1);
        printf("请确认密码");
        scanf("%s",mi2);
        if(strcmp(mi1,mi2)!=0)
        {
            printf("\t\t×注册失败,两次密码不同");
            return 0;
        }
        fp=fopen("yue.txt","at");
        fprintf(fp,"%s %s %s\n",a,ca,mi1);
        fclose(fp);
    }
    else
    {
        printf("\t\t×注册失败，请输入正确的收货信息：");
        return 0;
    }
    return LU;   
}
void Register()
{
    int y;
    char a;
    FILE *fp;
    shop sq;//申请 
    system("cls");
    printf("\n\n\n\t\t\t\t1.注册用户\t\t\t2.申请店铺\n");
    printf("\t\t\t\t0.返回上一级");
    while(1)
    {
        printf("\t\t▲  请选择要进行的选项："); 
        scanf("%d",&y);
        if(y==1)//用户注册 
        {
            link_user LU;
            LU=creatu(); 
            userwrite2(LU);
        }
        if(y==2)
        {
            printf("请输入店铺名称：");
            scanf("%s",sq.name);
            printf("请输入店铺电话：");
            scanf("%s",sq.phone);
            printf("请输入店铺地址：");
            scanf("%s",sq.address); 
            printf("请输入店铺密码：");
            scanf("%s",sq.password);
            fp=fopen("shenqing.txt","at");
            if(fp==NULL)
            {
                printf("发生错误，无法打开文件");
                return; 
            }
            printf("是否保存？Y/else");
            scanf("%*c%c",&a);
            if(a=='Y')
            {   
                fprintf(fp," %s %s %s %s \n",sq.name,sq.phone,sq.address,sq.password);
                fclose(fp);
                printf("\t\t√   申请成功，等待上级审核"); 
            }
            else
            {
                printf("\t\t×   已放弃申请");
                fclose(fp); 
            }
        }
        if(y==0)
        {
            system("cls");
            printf("\t\tWELCOME\n这里是外卖管理系统，请选择接下来的操作：");
            printf("\n\n\t\t\t\t1.登陆");
            printf("\t\t\t\t2.注册\n"); 
            break;      
        }
    }
}
void choose()
{
    int x;
    ME();
    while(1)
    {
        scanf("%d",&x);
        if(x==1)
            login();
        if(x==0)
        {
            Exit();
            return;
        }

        if(x==2)
            Register();
    }
}
int main()
{
    choose(); 
}

代码有些多，因为要用到文件以及文件交互，因此这里有整个的文件外卖管理系统。