C語言如何實現點餐系統

#include<iostream>
#include<cstring>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<cstring>
#include<conio.h>
using namespace std;

typedef struct member
{
 char username[20];//用戶名
 char password[20];//密碼
}Member;

typedef struct product
{
 char name[20];//菜品名
 int price;
 int num;//銷售數量
}Product;

/*菜單函數區*/
void menu1();/*主菜單*/
void menu2();/*管理員界面*/

void all_info();//點單信息
void member_log_up();//注冊
void member_log_in_interface();//登錄界面外觀
int member_log_in();//登錄
void check();

/*管理員菜單函數*/
void sell_info();//菜品所有信息
void password_manage();//用戶名密碼信息
int compare_password(char password[]);//對比密碼函數

int main()
{
 int flag1=1,flag_member=0,flag_admin=0;
 int choice1,choice2;

 while(flag1){
 menu1();
 printf("\n");
 printf("請您選擇(1-5):");
 scanf("%d",&choice1);
 if(choice1==1)/*會員登錄*/
 {
  member_log_in_interface();

  flag_member=member_log_in();

  while(flag_member)
  {

   all_info();
   check();
  }
 }
 else if(choice1==2)/*會員注冊*/
 {
  printf("\n\n\n\t\t\t正在進入用戶注冊界面...\n");

  member_log_up();
 }
 else if(choice1==3)/*管理員登錄*/
 {
  printf("請輸入密碼：");
  char password[20]={0};
  scanf("%s",password);
  if(compare_password(password))
  {
   printf("\n\n\t\t\t\t --輸入密碼正確!--\n\n\t\t\t\t==正在進入管理員界面==\n");
   flag_admin=1;

  }
  else
  {
   printf("\n\n\t\t\t\t --輸入密碼錯誤!--\n");

  }
  while(flag_admin)
  {
   menu2();
   printf("請您選擇(1-3):");
   scanf("%d",&choice2);
   switch(choice2)
   {
    case 1:password_manage();break;
    case 2:sell_info();break;
    case 3:flag_admin=0;break;
   }
  }
 }
 else if(choice1==4)/*退出系統*/
 {
  flag1=0;
 }
 }
 printf("你已經安全退出系統!(按任意鍵關閉界面)\n\n\t歡迎您的再次使用!\n\n");
 return 0;
}

void menu1()
{
 system("color E9");
 printf("\n\n");
 printf("\t\t\t *=======================================*\n");
 printf("\t\t\t| * - * - * Zhou Cheng - System - * - * |\n");
 printf("\t\t\t| *          * |\n");
 printf("\t\t\t| | [1] 會員登錄      | |\n");
 printf("\t\t\t| *          * |\n");
 printf("\t\t\t| | [2] 會員注冊      | |\n");
 printf("\t\t\t| *          * |\n");
 printf("\t\t\t| | [3] 管理員登錄     | |\n");
 printf("\t\t\t| *          * |\n");
 printf("\t\t\t| | [4] 退出系統      | |\n");
 printf("\t\t\t| *          * |\n");
 printf("\t\t\t| * - * - * - * - * - * - * - * - * - * |\n");
 printf("\t\t\t *=======================================*\n");
}

void menu2()
{
 printf("\n\n");
 printf("\t\t\t *======================================*\n");
 printf("\t\t\t| | * - * - * 管-理-員-界-面 * - * - * | |\n");
 printf("\t\t\t| *         * |\n");
 printf("\t\t\t| | [1] 會員密碼管理    | |\n");
 printf("\t\t\t| * [2] 各產品銷售信息    * |\n");
 printf("\t\t\t| * [3] 退出管理員界面    * |\n");
 printf("\t\t\t| |         | |\n");
 printf("\t\t\t| * - * - * - * - * -- * - * - * - * - * |\n");
 printf("\t\t\t *======================================*\n");
}

int compare_password(char password[])/*管理員密碼比對函數 */
{
 int i,flag=1;
 for(i=0;i<6;i++)
 {
  if(password[i]!='1'+i)flag=0;
 }
 return flag;
}

void member_log_up()//會員注冊函數
{

 Member member;

 while(1)
 {
  printf("請輸入您想創建的username（用戶名）：");
  scanf("%s",member.username);

  printf("請輸入您的密碼（20個字符以內）：");
  scanf("%s",member.password);

  printf("是否確認創建（y/n）：");
  char ch=getch();
  if(ch=='n')continue;
  else if(ch=='y')
  {
   FILE *fp=fopen("memberInfo.txt","a+");
   fprintf(fp,"%s %s ",member.username,member.password);
   fclose(fp);
   printf("\n您已注冊成功！\n");
   printf("--------正在返回大廳--------");

   return ;
  }
 }
}

int member_log_in()
{
  Member member[100];
  FILE *fp=fopen("memberInfo.txt","a+");
  int i=0;
  while(!feof(fp))
  {
   fscanf(fp,"%s %s",member[i].username,member[i].password);
   i++;
  }
  char username[20],password[20];
  scanf("%s",username);
  printf("\t\t\t 密碼 (password):");
  scanf("%s",password);
  int flag=0;
  for(int j=0;j<i;j++)
  {
   if(strcmp(username,member[j].username)==0&&strcmp(password,member[j].password)==0)
   {
    flag=1;
    break;
   }
  }
  return flag;
}

void member_log_in_interface()/*登入界面*/
{
 printf("\n\n\n\t\t\t***================================*** \n");
 printf("\t\t\t         \n");
 printf("\t\t\t 用戶名 (username):");
}

void all_info()
{
 Product product[100];
 FILE *fp=fopen("productInfo.txt","a+");
  int i=0;
  while(!feof(fp))
  {
   fscanf(fp,"%s %d %d",product[i].name,&product[i].price,&product[i].num);
   i++;
  }
  printf("編號--菜品名---------單價---\n");
  for(int j=0;j<i;j++)
  {
   printf("%-6d%-15s%-7d\n",j+1,product[j].name,product[j].price);
  }
  printf("請輸入想要購買的菜品編號以及數量（用空格分割）：");
  int num,count;
  scanf("%d %d",&num,&count);
  printf("此函數還沒寫完...\n");
  printf("按任意鍵前往結算界面：");
  char c;
  scanf(" %c",&c);
}

void sell_info()
{
 Product product[100];
 FILE *fp=fopen("productInfo.txt","a+");
  int i=0;
  while(!feof(fp))
  {
   fscanf(fp,"%s %d %d",product[i].name,&product[i].price,&product[i].num);
   i++;
  }
  printf("--菜品名---------單價---銷售量---銷售額--\n");
  for(int j=0;j<i;j++)
  {
   printf(" %-15s%-7d%-9d%-8d\n",product[j].name,product[j].price,product[j].num,product[j].price*product[j].num);
  }
  printf("按任意鍵返回菜單：");
  char c;
  scanf(" %c",&c);
}
void password_manage()
{
  Member member[100];
  FILE *fp=fopen("memberInfo.txt","a+");
  int i=0;
  while(!feof(fp))
  {
   fscanf(fp,"%s %s",member[i].username,member[i].password);
   i++;
  }
  printf("----用戶名------------密碼----------");
  for(int j=0;j<i;j++)
  {
   printf("\n %-17s %-15s",member[j].username,member[j].password);
  }
  printf("按任意鍵返回菜單：");
  char c;
  scanf(" %c",&c);
}

void check()
{
  printf("此函數還沒寫...\n");
  printf("按任意鍵返回菜單：");
  char c;
  scanf(" %c",&c);
}