#include <stdio.h>
#include <stdlib.h>

int main()
{
    int choice;

    //显示菜单
    printf("                              1.Input\n");
    printf("                              2.Output\n");
    printf("                              3.Order\n");
    printf("                              4.Quit\n");

    scanf("%c",&choice);

    //根据用户选择输出信息
    switch(choice)
    {
        case 'i':
            printf("You are trying to Input info\n");
            break;
        case 'o':
            printf("You are trying to Output info\n");
            break;
        case 'm':
            printf("You are trying to Make things ordered\n");
            break;
        case 'q':
            printf("You are about to Quit\n");
            break;
        default:
            printf("Wrong input");
    }
  return 0;


}