[C++知识库]C++智能点餐系统

项目实现：通过主菜单选择需要的服务，实现网上点餐，支付功能

#include <iostream>
#include <fstream>//设置文件
#include <string>
#include <conio.h>//等待输入

using namespace std;
/*
食物
    名字
    价格
    种类
 */
class food
{
public:
    string name;
    int price;
    food(){}
    food(string na,int pr):name(na),price(pr){}
};
food zhushi[3]={food("米饭",2),food("花卷",1),food("白饼",3)};
food liangcai[3]={food("蒜蓉油麦",10),food("拍黄瓜  ",11),food("凉拌海蜇",12)};
food recai[3]={food("鱼香肉丝",23),food("肉沫茄子",13),food("松鼠鳜鱼",35)};
food soup[3]={food("西湖牛肉羹",20),food("紫菜蛋花汤",15),food("醪糟汤    ",17)};
food drink[3]={food("可乐",3),food("雪碧",3),food("啤酒",5)};

主食

food myfood[15];
int money=0;
int num=0;


//主食
void xuanzhushi()
{
    void Menu();
    void Diancan();
    system("cls");
    cout<<"\r\n";
    cout<<"\r\n";
    cout<<"\t\t\t主食有：\r\n";
    cout<<"\t\t\t\t\t**************************************\r\n";
    cout<<"\t\t\t\t\t*          1、"<<zhushi[0].name<<" 价格："<<zhushi[0].price<<"           *"<<endl;
    cout<<"\t\t\t\t\t*          2、"<<zhushi[1].name<<" 价格："<<zhushi[1].price<<"           *"<<endl;
    cout<<"\t\t\t\t\t*          3、"<<zhushi[2].name<<" 价格："<<zhushi[2].price<<"           *"<<endl;
    cout<<"\t\t\t\t\t*                                    *\r\n";
    cout<<"\t\t\t\t\t*          4、返回                   *"<<endl;
    cout<<"\t\t\t\t\t**************************************\r\n";
    char c;
    c=getch();
    switch(c)
    {
        case'1':    myfood[num]=zhushi[0];money+=zhushi[0].price;num++;
                    printf("米饭");
                    break;
        case'2':    myfood[num]=zhushi[1];money+=zhushi[1].price;num++;
                    printf("花卷");
                    break;
        case'3':    myfood[num]=zhushi[2];money+=zhushi[2].price;num++;
                    printf("白饼");
                    break;
        case'4':    Diancan();  break;
        default:
            printf("\n输入有误！请重新选择！\n");
            getch();
            xuanzhushi();
    }
    printf("\n点餐成功！请按任意键继续点餐或者返回！\n");
    getch();
    if(num>30)
    {
        cout<<"您本次点餐已达上限！如果需要！请结算后继续点餐"<<endl;
        printf("\n请按任意键返回主菜单\n");
        getch();
        Menu();
    }
    else xuanzhushi();
}

菜品

//热菜
void xuanrecai()
{
    void Menu();
    void Diancan();
    system("cls");
    cout<<"\r\n";
    cout<<"\r\n";
    cout<<"\t\t\t热菜有：\r\n";
    cout<<"\t\t\t\t\t**************************************\r\n";
    cout<<"\t\t\t\t\t*          1、"<<recai[0].name<<" 价格："<<recai[0].price<<"      *"<<endl;
    cout<<"\t\t\t\t\t*          2、"<<recai[1].name<<" 价格："<<recai[1].price<<"      *"<<endl;
    cout<<"\t\t\t\t\t*          3、"<<recai[2].name<<" 价格："<<recai[2].price<<"      *"<<endl;
    cout<<"\t\t\t\t\t*                                    *\r\n";
    cout<<"\t\t\t\t\t*          4、返回                   *"<<endl;
    cout<<"\t\t\t\t\t**************************************\r\n";

    char c;
    c=getch();
    switch(c)
    {
        case'1':    myfood[num]=recai[0];money+=recai[0].price;num++;
                    printf("鱼香肉丝");
                    break;
        case'2':    myfood[num]=recai[1];money+=recai[1].price;num++;
                    printf("肉沫茄子");
                    break;
        case'3':    myfood[num]=recai[2];money+=recai[2].price;num++;
                    printf("松鼠鳜鱼");
                    break;
        case'4':    Diancan();  break;
        default:
            printf("\n输入有误！请重新选择！\n");
            getch();
            xuanrecai();
    }
    printf("\n点餐成功！请按任意键继续点餐或者返回！\n");
    getch();
    if(num>30)
    {
        cout<<"您本次点餐已达上限！如果需要！请结算后继续点餐"<<endl;
        printf("\n请按任意键返回主菜单\n");
        getch();
        Menu();
    }
    else xuanrecai();
}

//凉菜
void xuanliangcai()
{
    void Menu();
    void Diancan();
    system("cls");
    cout<<"\r\n";
    cout<<"\r\n";
    cout<<"\t\t\t凉菜有：\r\n";
    cout<<"\t\t\t\t\t**************************************\r\n";
    cout<<"\t\t\t\t\t*          1、"<<liangcai[0].name<<" 价格："<<liangcai[0].price<<"      *"<<endl;
    cout<<"\t\t\t\t\t*          2、"<<liangcai[1].name<<" 价格："<<liangcai[1].price<<"      *"<<endl;
    cout<<"\t\t\t\t\t*          3、"<<liangcai[2].name<<" 价格："<<liangcai[2].price<<"      *"<<endl;
    cout<<"\t\t\t\t\t*                                    *\r\n";
    cout<<"\t\t\t\t\t*          4、返回                   *"<<endl;
    cout<<"\t\t\t\t\t**************************************\r\n";
    char c;
    c=getch();
    switch(c)
    {
        case'1':    myfood[num]=liangcai[0];money+=liangcai[0].price;num++;
                    printf("蒜蓉油麦");
                    break;
        case'2':    myfood[num]=liangcai[1];money+=liangcai[1].price;num++;
                    printf("拍黄瓜");
                    break;
        case'3':    myfood[num]=liangcai[2];money+=liangcai[2].price;num++;
                    printf("凉拌海蜇");
                    break;
        case'4':    Diancan();  break;
        default:
            printf("\n输入有误！请重新选择！\n");
            getch();
            xuanliangcai();
    }
    printf("\n点餐成功！请按任意键继续点餐或者返回！\n");
    getch();
    if(num>30)
    {
        cout<<"您本次点餐已达上限！如果需要！请结算后继续点餐"<<endl;
        printf("\n请按任意键返回主菜单\n");
        getch();
        Menu();
    }
    else xuanliangcai();
}

汤品及饮料

//汤
void xuansoup()
{
    void Menu();
    void Diancan();
    system("cls");
    cout<<"\r\n";
    cout<<"\r\n";
    cout<<"\t\t\t汤品有：\r\n";
    cout<<"\t\t\t\t\t**************************************\r\n";
    cout<<"\t\t\t\t\t*          1、"<<soup[0].name<<" 价格："<<soup[0].price<<"    *"<<endl;
    cout<<"\t\t\t\t\t*          2、"<<soup[1].name<<" 价格："<<soup[1].price<<"    *"<<endl;
    cout<<"\t\t\t\t\t*          3、"<<soup[2].name<<" 价格："<<soup[2].price<<"    *"<<endl;
    cout<<"\t\t\t\t\t*                                    *\r\n";
    cout<<"\t\t\t\t\t*          4、返回                   *"<<endl;
    cout<<"\t\t\t\t\t**************************************\r\n";
    char c;
    c=getch();
    switch(c)
    {
        case'1':    myfood[num]=soup[0];money+=soup[0].price;num++;
                    printf("西湖牛肉羹");
                    break;
        case'2':    myfood[num]=soup[1];money+=soup[1].price;num++;
                    printf("紫菜蛋花汤");
                    break;
        case'3':    myfood[num]=soup[2];money+=soup[2].price;num++;
                    printf("醪糟汤");
                    break;
        case'4':    Diancan();  break;
        default:
            printf("\n输入有误！请重新选择！\n");
            getch();
            xuansoup();
    }
    printf("\n点餐成功！请按任意键继续点餐或者返回！\n");
    getch();
    if(num>30)
    {
        cout<<"您本次点餐已达上限！如果需要！请结算后继续点餐"<<endl;
        printf("\n请按任意键返回主菜单\n");
        getch();
        Menu();
    }
    else xuansoup();
}

//饮料
void xuandrink()
{
    void Menu();
    void Diancan();
    system("cls");
    cout<<"\r\n";
    cout<<"\r\n";
    cout<<"\t\t\t饮料有：\r\n";
    cout<<"\t\t\t\t\t**************************************\r\n";
    cout<<"\t\t\t\t\t*          1、"<<drink[0].name<<" 价格："<<drink[0].price<<"           *"<<endl;
    cout<<"\t\t\t\t\t*          2、"<<drink[1].name<<" 价格："<<drink[1].price<<"           *"<<endl;
    cout<<"\t\t\t\t\t*          3、"<<drink[2].name<<" 价格："<<drink[2].price<<"           *"<<endl;
    cout<<"\t\t\t\t\t*                                    *\r\n";
    cout<<"\t\t\t\t\t*          4、返回                   *"<<endl;
    cout<<"\t\t\t\t\t**************************************\r\n";
    char c;
    c=getch();
    switch(c)
    {
        case'1':    myfood[num]=drink[0];money+=drink[0].price;num++;
                    printf("可乐");
                    break;
        case'2':    myfood[num]=drink[1];money+=drink[1].price;num++;
                    printf("雪碧");
                    break;
        case'3':    myfood[num]=drink[2];money+=drink[2].price;num++;
                    printf("啤酒");
                    break;
        case'4':    Diancan();  break;
        default:
            printf("\n输入有误！请重新选择！\n");
            getch();
            xuandrink();
    }
    printf("\n点餐成功！请按任意键继续点餐或者返回！\n");
    getch();
    if(num>30)
    {
        cout<<"您本次点餐已达上限！如果需要！请结算后继续点餐"<<endl;
        printf("\n请按任意键返回主菜单\n");
        getch();
        Menu();
    }
    else xuandrink();
}

需要实现的功能

//点餐
void Diancan()
{
    void Menu();
    system("cls");
    cout<<endl<<endl<<"\t\t\t请选择主食！"<<endl<<endl;
    cout<<"\t\t\t\t\t************* 您现在想  **************\r\n";
    cout<<"\t\t\t\t\t********                      ********"<<endl;
    cout<<"\t\t\t\t\t*             1、主食                *"<<endl;
    cout<<"\t\t\t\t\t*             2、热菜                *"<<endl;
    cout<<"\t\t\t\t\t*             3、凉菜                *"<<endl;
    cout<<"\t\t\t\t\t*             4、汤品                *"<<endl;
    cout<<"\t\t\t\t\t*             5、饮料                *"<<endl;
    cout<<"\t\t\t\t\t*             6、返回                *"<<endl;
    cout<<"\t\t\t\t\t**************************************\r\n";
    char c;
    c=getch();
    switch(c)
    {
        case'1':    xuanzhushi();   break;
        case'2':    xuanrecai();    break;
        case'3':    xuanliangcai(); break;
        case'4':    xuansoup();     break;
        case'5':    xuandrink();    break;
        case'6':    Menu();         break;
        default:
            printf("\n输入有误！请重新选择！\n");
            getch();
            Diancan();
    }
}


//查看已点
void Show()
{
    void Menu();
    system("cls");
    int i;
    for(i=0;i<num;i++)
    {
        cout<<i+1<<""<<myfood[i].name<<" "<<myfood[i].price<<endl;
    }
    cout<<"总价"<<money<<endl;
    printf("\n按任意键返回主菜单！\n");
    getch();
    Menu();
}


//清空已点
void Clear()
{
    void Menu();
    system("cls");
    num=0;
    money=0;
    printf("\n清空成功！\n按任意键返回菜单！\n");
    getch();
    Menu();
}

//支付
void Pay()
{
    void Menu();
    system("cls");

    cout<<"您本次消费"<<money<<"元！请支付！"<<endl;
    int m,s;
    cin>>m;
    s=m-money;
    while(s<0)
    {
        cout<<"您给的资金不足，还需要"<<0-s<<"元！请继续支付现金！"<<endl;
        cin>>m;
        s=m+s;
    }
    while(s>0)
    {
        cout<<"找零"<<s-0<<"元！"<<endl;
        printf("%d",(s-0));
        break;
    }

    cout<<"结算后清空账单!请按   1"<<endl;
    char b;
    b=getch();
    switch(b)
    {
        case'1':    Clear();    break;
        getch();
        Menu();
    }
        Menu();
}

//主菜单
void Menu()
{
    system("cls");
    cout<<endl<<endl<<"\t\t\t欢迎光临！"<<endl<<endl;
    cout<<"\t\t\t\t\t************* 您现在想  **************\r\n";
    cout<<"\t\t\t\t\t********                      ********"<<endl;
    cout<<"\t\t\t\t\t*             1、点餐                *"<<endl;
    cout<<"\t\t\t\t\t*             2、查看                *"<<endl;
    cout<<"\t\t\t\t\t*             3、清空                *"<<endl;
    cout<<"\t\t\t\t\t*             4、支付                *"<<endl;
    cout<<"\t\t\t\t\t*             5、退出                *"<<endl;
    cout<<"\t\t\t\t\t**************************************\r\n";
    char c;
    c=getch();
    switch(c)
    {
        case'1':    Diancan();  break;
        case'2':    Show();     break;
        case'3':    Clear();    break;
        case'4':    Pay();      break;
        case'5':    exit(0);
        default:
            printf("\n输入有误！请重新选择！\n");
            getch();
            Menu();
    }
}
int main()
{
    Menu();
    return 0;
}