#include <stdio.h>

void manage()//管理主体函数
{
    printf("                              1.Input\n");
    printf("                              2.Output\n");
    printf("                              3.Order\n");
    printf("                              4.Quit\n");
    char keywords;
    keywords = getchar();
    switch (keywords) {
    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\n");
        break;
    }
}
int main()
    {
        manage();
        return 0;
    }