#include"stdio.h"

void main()

{

char letter;

printf("Input letter the first letter of someday:\n");

while((letter=getch())!='y')

{

switch(letter)

{

case 's':printf("please input second letter:\n");
        if((letter=getch())=='a')

        printf("saturday\n");

        else if((letter=getch())=='u')

        printf("sunday\n");

        else

        printf("data is error\n");

        break;

case 'f':

        printf("friday\n"); break;

case 'm':

        printf("monday\n"); break;

case 't':

        printf("please input the second letter:\n");

        if((letter==getch())=='u')

        printf("tuesday\n");

        else if((letter=getch())=='h')

        printf("thursday\n");

        else

        printf("date is error\n");

        break;

case 'w':

        printf("wednesday\n");break;

        default:

        printf("data is error\n");break;

        getch();

        }

      }

    }


getch()  函数到底是干什么的啊   不是暂停的吗   怎么能用做输入  而且 程序还不段循环  遇到 break; 都跳不出来   具体看看这个程序