C language realizes ordering system

This article shares the specific code of C language ordering system for your reference. The specific content is as follows

#include<iostream>
#include<fstream>
#include<string>
#include<conio.h>
using namespace std;
class shiwu
{
public:
 string mingzi;
 int price;
 shiwu(){}
 shiwu(string n,int p):mingzi(n),price(p){}
};
shiwu zhucan[3]={shiwu(" Big hamburger ",13),shiwu(" Roast dinner ",13),shiwu(" Chicken book ",11)};
shiwu fushi[3]={shiwu(" Spicy chicken nail ",9),shiwu(" Fried chicken and rice ",9),shiwu(" Large fries ",6)};
shiwu drink[3]={shiwu(" Coca-Cola ",5),shiwu(" latte ",6),shiwu(" Hot milk ",6)};
class Taocan
{
public:
 string mingzi;
 shiwu tc[3];
 int price;
 Taocan(){}
 Taocan(string n,shiwu a,shiwu b,shiwu c)
 {
  mingzi=n;
  tc[0]=a;
  tc[1]=b;
  tc[2]=c;
  price=a.price+b.price+c.price-10;
 }
};
Taocan taocan[3]={Taocan(" Set with chicken legs and wings ",zhucan[0],fushi[0],drink[0]),Taocan(" Cod, chicken and rice with flowers ",zhucan[1],fushi[1],drink[0]),Taocan(" Chicken wrap and fries combo ",zhucan[2],fushi[2],drink[0])};
shiwu myshiwu[13];
int mymoney;
int mynum=0;
void write()
{
 ofstream f("list.txuant");
 int i;
 f << "KFC Consumer list \n";
 for(i=0;i<mynum;i++) 
  f<<i+1<<" , "<<myshiwu[i].mingzi<<"  Price: "<<myshiwu[i].price<<endl;
 f<<" The total price, "<<mymoney<<endl;
 f<<endl<<endl;
 f.close();
 system("list.txuant");
}
void xuanzhucan()
{
 void Menu();
 void Diancan();
 system("cls");
 cout<<"1 , "<<zhucan[0].mingzi<<"  Price: "<<zhucan[0].price<<endl;
 cout<<"2 , "<<zhucan[1].mingzi<<"  Price: "<<zhucan[1].price<<endl;
 cout<<"3 , "<<zhucan[2].mingzi<<"  Price: "<<zhucan[2].price<<endl;
 cout<<"4 , return "<<endl;
 char c;
 c=getch();
 switch(c)
 {
  case '1': myshiwu[mynum]=zhucan[0];mymoney+=zhucan[0].price;mynum++;  break;
  case '2': myshiwu[mynum]=zhucan[1];mymoney+=zhucan[1].price;mynum++;  break;
  case '3': myshiwu[mynum]=zhucan[2];mymoney+=zhucan[2].price;mynum++;  break;
  case '4': Diancan();  break;
  default: 
   printf("\n Your key is wrong, press any key to select again! \n");
   getch();
   xuanzhucan();
 } 
 printf("\n Order successfully! Press any key to continue or return! \n");
 getch();
 if(mynum>10)
 {
  cout<<" Your order has reached the limit! If necessary! Please continue your order after you settle your account! "<<endl;
  printf("\n Press any key to enter the menu! \n");
  getch();
  Menu();
 }
 else xuanzhucan();
}
void xuanfushi()
{
 void Menu();
 void Diancan();
 system("cls");
 cout<<"1 , "<<fushi[0].mingzi<<"  Price: "<<fushi[0].price<<endl;
 cout<<"2 , "<<fushi[1].mingzi<<"  Price: "<<fushi[1].price<<endl;
 cout<<"3 , "<<fushi[2].mingzi<<"  Price: "<<fushi[2].price<<endl;
 cout<<"4 , return "<<endl;
 char c;
 c=getch();
 switch(c)
 {
  case '1': myshiwu[mynum]=fushi[0];mymoney+=fushi[0].price;mynum++;  break;
  case '2': myshiwu[mynum]=fushi[1];mymoney+=fushi[1].price;mynum++;  break;
  case '3': myshiwu[mynum]=fushi[2];mymoney+=fushi[2].price;mynum++;  break;
  case '4': Diancan();  break;
  default: 
   printf("\n Your key is wrong, press any key to select again! \n");
   getch();
   xuanfushi();
 } 
 printf("\n Order successfully! Press any key to continue or return! \n");
 getch();
 if(mynum>10)
 {
  cout<<" Your order has reached the limit! If necessary! Please continue your order after you settle your account! "<<endl;
  printf("\n Press any key to enter the menu! \n");
  getch();
  Menu();
 }
 else xuanfushi();
}
void xuandrink()
{
 void Menu();
 void Diancan();
 system("cls");
 cout<<"1 , "<<drink[0].mingzi<<"  Price: "<<drink[0].price<<endl;
 cout<<"2 , "<<drink[1].mingzi<<"  Price: "<<drink[1].price<<endl;
 cout<<"3 , "<<drink[2].mingzi<<"  Price: "<<drink[2].price<<endl;
 cout<<"4 , return "<<endl;
 char c;
 c=getch();
 switch(c)
 {
  case '1': myshiwu[mynum]=drink[0];mymoney+=drink[0].price;mynum++;  break;
  case '2': myshiwu[mynum]=drink[1];mymoney+=drink[1].price;mynum++;  break;
  case '3': myshiwu[mynum]=drink[2];mymoney+=drink[2].price;mynum++;  break;
  case '4': Diancan();  break;
  default: 
   printf("\n Your key is wrong, press any key to select again! \n");
   getch();
   xuandrink();
 } 
 printf("\n Order successfully! Press any key to continue or return! \n");
 getch();
 if(mynum>10)
 {
  cout<<" Your order has reached the limit! If necessary! Please continue your order after you settle your account! "<<endl;
  printf("\n Press any key to enter the menu! \n");
  getch();
  Menu();
 }
 else xuandrink();
}
void Taocan()
{
 void Menu();
 void Diancan();
 system("cls");
 cout<<"1 , "<<taocan[0].mingzi<<"  Price: "<<taocan[0].price<<endl;
 cout<<"2 , "<<taocan[1].mingzi<<"  Price: "<<taocan[1].price<<endl;
 cout<<"3 , "<<taocan[2].mingzi<<"  Price: "<<taocan[2].price<<endl;
 cout<<"4 , return "<<endl;
 char c;
 c=getch();
 switch(c)
 {
  case '1': mymoney+=taocan[0].price;myshiwu[mynum]=taocan[0].tc[0];mynum++;myshiwu[mynum]=taocan[0].tc[1];mynum++;myshiwu[mynum]=taocan[0].tc[2];mynum++;  break;
  case '2': mymoney+=taocan[1].price;myshiwu[mynum]=taocan[1].tc[0];mynum++;myshiwu[mynum]=taocan[1].tc[1];mynum++;myshiwu[mynum]=taocan[1].tc[2];mynum++;  break;
  case '3': mymoney+=taocan[2].price;myshiwu[mynum]=taocan[2].tc[0];mynum++;myshiwu[mynum]=taocan[2].tc[1];mynum++;myshiwu[mynum]=taocan[2].tc[2];mynum++;  break;
  case '4': Diancan();  break;
  default: 
   printf("\n Your key is wrong, press any key to select again! \n");
   getch();
   Taocan();
 } 
 printf("\n Order successfully! Press any key to continue or return! \n");
 getch();
 if(mynum>10)
 {
  cout<<" Your order has reached the limit! If necessary! Please continue your order after you settle your account! "<<endl;
  printf("\n Press any key to enter the menu! \n");
  getch();
  Menu();
 }
 else Taocan();
}
void Diancan()
{
 void Menu();
 system("cls");
 cout<<"1 The staple food, "<<endl;
 cout<<"2 , snacks "<<endl;
 cout<<"3 , drinks "<<endl;
 cout<<"4 And package "<<endl;
 cout<<"5 , return "<<endl;
 char c;
 c=getch();
 switch(c)
 {
  case '1': xuanzhucan();  break;
  case '2': xuanfushi();  break;
  case '3': xuandrink();  break;
  case '4': Taocan();  break;
  case '5': Menu();  break;
  default: 
   printf("\n Your key is wrong, press any key to select again! \n");
   getch();
   Diancan();
 } 
}
void Zhifu()
{
 void Menu();
 system("cls");
 cout<<" Your current consumption "<<mymoney<<" Yuan! Cash, please! "<<endl;
 int m,s;
 cin>>m;
 s=m-mymoney;
 while(s<0)
 {
  cout<<" The cash you give is not enough, we still need it "<<0-s<<" Yuan! Please keep paying cash! "<<endl;
  cin>>m;
  s=m+s;
 }
 cout<<" Successful payment! The change "<<s<<" Yuan! Wish you a happy life! "<<endl;
 write();
 printf("\n Press any key to return to the menu! \n");
 getch();
 Menu();
}
void Youhuiquan()
{
 void Menu();
 system("cls");
 printf("\n Please enter your coupon! \n");
 string yhq;
 cin>>yhq;
 if(yhq=="156157158")
 {
  cout<<" You have successfully used it 5 Yuan coupon! "<<endl;
  mymoney=mymoney-5;
 }
 else
 {
  cout<<" I'm sorry! Your coupon is invalid! "<<endl;
  getch();
  Menu();
 }
 getch();
 Zhifu();
}

void Jiesuan()
{
 void Menu();
 system("cls");
 cout<<"1 3. Use coupons "<<endl;
 cout<<"2 , direct payment "<<endl;
 cout<<"4 , return "<<endl;
 char c;
 c=getch();
 switch(c)
 {
  case '1': Youhuiquan();  break;
  case '2': Zhifu();  break;
  case '4': Menu();  break;
  default: 
   printf("\n Your key is wrong, press any key to select again! \n");
   getch();
   Diancan();
 } 
}
void Show()
{ 
 void Menu();
 system("cls");
 int i;
 for(i=0;i<mynum;i++)
  cout<<i+1<<" , "<<myshiwu[i].mingzi<<"  Price: "<<myshiwu[i].price<<endl;
 cout<<" The total price, "<<mymoney<<endl;
 printf("\n Press any key to return to the menu! \n");
 getch();
 Menu();
}
void Clean()
{
 void Menu();
 system("cls");
 mynum=0;
 mymoney=0;
 printf("\n Clear success! \n Press any key to return to the menu! \n");
 getch();
 Menu();
}
void Menu()
{
 system("cls");
 cout<<endl<<endl<<" Welcome in! "<<endl<<endl;
 cout<<" Please select service: "<<endl;
 cout<<"1 Order, "<<endl;
 cout<<"2 , check already clicked "<<endl;
 cout<<"3 , empty already point "<<endl;
 cout<<"4 , settlement "<<endl;
 cout<<"5 , exit "<<endl;
 char c;
 c=getch();
 switch(c)
 {
  case '1': Diancan();  break;
  case '2': Show(); break;
  case '3': Clean(); break;
  case '4': Jiesuan(); break;
  case '5': exit(0);
  default: 
   printf("\n Your key is wrong, press any key to select again! \n");
   getch();
   Menu();
 } 
}
void main()
{
 Menu();
}

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