#include <stdio.h>
void main(){
int chon ;
do{
system("cls"); // lenh xoa man hinh
printf("----------MENU----------\n");
printf("1. Chuong trinh 1\n");
printf("2. Chuong trinh 2\n");
printf("3. Chuong trinh 3\n");
printf("0. Thoat \n");
printf("Moi ban chon menu: ");
scanf("%d", &chon);
switch(chon){
case 1:
printf("Thuc hien cong viec 1, goi ham 1");
break;
case 2:
printf("Thuc hien cong viec 2, goi ham 2");
break;
case 3:
printf("Thuc hien cong viec 3, goi ham 3");
break;
default:
printf("Ket thuc chuong trinh");
break;
}
printf("Ban co muon tiep tuc khong? (Nhap y/n)");
char c ;
fflush(stdin);
scanf("%c", &c);
if(c == 'y'){
chon = -1; // gan chon khong phai la 1,2,3,0 thi chuong trinh se lap lai
}else{
printf("Tam biet!");
}
}while(chon != 1 && chon != 2 && chon !=3 && chon!=0);
}