#include<stdio.h>
void main()
{
    char x;
    x=getchar();


       switch(x)
       {
        case 's':printf("please input second letter");
            if(x=='a')
            {
                printf("星期天");break;
            }
            else if(x=='u')
            {
                    printf("星期六");break;
            }
            else
            {
                printf("error");
            }
        case 'm':printf("星期一");break;
        case 'f':printf("星期五");break;
        case 'w':printf("星期三");break;
        case 't':printf("please input second letter");
            if(x=='h')
            {
                printf("星期四");break;
            }
            else if(x=='u')
            {
                printf("星期二");break;
            }
            else
            {
                printf("error");
            }
    
    
       }
    
}

星期六和星期天输不出来 请高手帮帮忙

case 's':printf("please input second letter");  /*x是个字符变量，假如x＝'s'才进入case 's'*/
            if(x=='a')        /*到这时x='s',这不会成立，所以不能输出*/
            {
                printf("星期天");break;
            }
            else if(x=='u') /*到这时x='s',也不会成立，所以也不能输出*/

            {
                    printf("星期六");break;
            }


下面的一样情况：
 
        case 't':printf("please input second letter");
            if(x=='h')
            {
                printf("星期四");break;
            }
            else if(x=='u')
            {
                printf("星期二");break;
            }
            else  
            {
                printf("error");
            }

switch(x)
       {
        case 's':printf("please input second letter");
            if(x=='a')
你都没有输入x

#includevoid main(){    char x;    x=getchar();       switch(x)       {        case 's':            printf("please input second letter \n");            scanf ("%s", &x);                        if(x=='a')            {                printf("星期天\n");                break;            }            else if(x=='u')            {                printf("星期六\n");                break;            }            else             {                printf("error");            }        case 'm':printf("星期一\n");            break;        case 'f':printf("星期\n");            break;        case 'w':printf("星期三\n");            break;        case 't':            printf("please input second letter \n");            scanf ("%s", &x);            if(x=='h')            {                printf("星期四\n");                break;            }            else if(x=='u')            {                printf("星期二\n");                break;            }            else             {                printf("error");            }               }    }

哇,怎么这样??
其实只要在输入的第二个字符时,加上语句scanf ("%s", &x),输入第二个字符就好了,下面的星期2,星期4也一样.

同意楼上的

我按照四楼 五楼的说法试了试结果是错误的啊

#include<stdio.h>
void main()
{
    char x;
    printf("please input first letter:\n");
    x=getchar();
    getchar();//清除后面的回车

       switch(x)
       {
        case 's':printf("please input second letter:\n");
            x=getchar();//加入读入字符的语句，后面的也是一样。后面的getchar()是用来清除回车。
            getchar();
            if(x=='a')
            {
                printf("星期天");break;
            }
            else if(x=='u')
            {
                    printf("星期六");break;
            }
            else
            {
                printf("error");
            }
        case 'm':printf("星期一");break;
        case 'f':printf("星期五");break;
        case 'w':printf("星期三");break;
        case 't':printf("please input second letter:\n");
            x=getchar();
            getchar();
            if(x=='h')
            {
                printf("星期四");break;
            }
            else if(x=='u')
            {
                printf("星期二");break;
            }
            else
            {
                printf("error");
            }


       }

}

[ 本帖最后由 soler 于 2009-8-19 09:18 编辑 ]

solerNB啊

谢谢 各位