该系统完成以下功能：
1.点餐，进入点餐界面，选择菜品。
2.添菜，在已点菜品的基础上增加菜品。
3.减菜，在已点菜品基础上减少菜品。
4.结算，根据已点菜品计算价格。
0.退出。
#include <stdio.h>void main_munu(){char a[6][20]={"","点餐","添菜","减菜","结算"};int i;for(i=1;i<5;i++){printf("\t%d.%s\n",i,a[i]);}printf("\t0.点餐结束\n");}void menu_caipin(){char a[10][20]={"宫保鸡丁 10","酱爆鸭片 18","木须肉 15","沸腾鱼 88","手撕圆白菜 12","麻婆豆腐 8","小鸡炖蘑菇 48","水晶肘子 58","米饭 3","香酥带鱼 25"};//定义字符数组，存放菜名printf("请具体选择菜品：\n");for (int i = 0; i < 10; i ++) {printf("\t\t%d.%s\n",i+1,a[i]);}printf("\t\t0.返回上层菜单\n");}int main(int agrc,const char *argv[]){printf("*******河北农大中餐店 *****\n");printf("****** 欢迎您点餐 *********\n");int M;int n;int k;int m;int x[10] = {0};int price1[10] = {0};int price[10] = {10,18,15,88,12,8,48,58,3,25};int total = 0;char name[10][20]={"宫保鸡丁 ","酱爆鸭片 ","木须肉 ","沸腾鱼 ","手撕圆白菜","麻婆豆腐 ","小鸡炖蘑菇","水晶肘子 ","米饭 ","香酥带鱼 "};while (1) {do {main_munu();scanf("%d",&M);if(M==0)break;switch (M){case 1:{menu_caipin();while (1) {scanf("%d",&n);if (n == 0){break;} price1[n-1] += price[n-1];x [n-1] ++;}}if (n == 0)break;case 2:{menu_caipin();printf("请选择要添加的菜：>");while(1){scanf("%d",&k);if (k == 0) {break;}price1[k-1] += price[k-1];x [k-1] ++; }} if(k == 0)break;case 3:{printf("请选择要减少的菜：>");menu_caipin();while(1){scanf("%d",&m);if(m==0){break;}price1[m-1] -= price[m-1];x [m-1] --; }}if(m == 0)break;case 4:{printf("菜名\t\t单价（元）\t数量\t总价格（元）\n-----------------------------------\n");for (int j = 0; j < 10; j++) {if (price1[j] != 0) {printf("%s\t\t%3d\t\t%3d\t%3d\n",name[j],price[j],x[j],price1[j]);total += price1[j];}}printf("总价格：\t\t\t\t\t%3d\n",total);printf("祝您用餐愉快，期待您的下次光临！\n");break;}break;}if(n == 0)break;}while(n) ;}return 0;}
