#include "stdafx.h"
#include "stdio.h"
int main(int argc, char* argv[])
{ //Sunday\Monday\Tuesday\Wednesday\Thursday\Friday\Saturday
char c;
printf("please enter the first number:\n");
while((c=getchar())!='\n')
{
switch(c)
{case 'S':
printf("please enter the second number:\n");
if((c=getchar())=='a')
printf("Saturday.\n");
else if((c=getchar())=='u')
printf("Sunday.\n");
else
printf("error data.\n");break;
case 'M':
printf("Monday.\n");break;
case 'T':
printf("please enter the second number:\n");
if((c=getchar())=='u')
printf("Tuesday.\n");
else if((c=getchar())=='h')
printf("Thursday.\n");
else
printf("error data.\n");break;
case 'W':printf("Wednesday.\n");break;
case 'F':printf("Friday.\n");break;
default:printf("error input.\n");
}
}
return 0;
}
这个程序在进行Saturday和Tuesday选择会出错

0分贴

排版惨不忍睹

怎么个错法?是没清空缓存?

printf("please enter the first number:\n");
while((c=getchar())!='\n')  //因为这里输入字符时，比如输入字符'S'，会同时将字符‘S’和‘\n’输入缓存,
                            //下次调用getchar()时，直接赋值为该缓存中的第一个字符
{
switch(c) //这里的c为‘S’
{case 'S':
printf("please enter the second number:\n");
if((c=getchar())=='a') //这里的c为‘\n’,另外输入的字符会在下次赋值时得到，例如输入'u'。
printf("Saturday.\n");
else if((c=getchar())=='u') //这里的c为‘u’,所以这种输入形式又正确了。
printf("Sunday.\n");
else
printf("error data.\n");break;


========================修改之后的代码为============================
#include "stdafx.h"
#include "stdio.h"

int main(int argc, char* argv[])
{ //Sunday\Monday\Tuesday\Wednesday\Thursday\Friday\Saturday
char c;
printf("please enter the first number:\n");
c=getchar(); //接收输入的字符
getchar();  //接受‘/n’
switch(c)
{case 'S':
printf("please enter the second number:\n");
c=getchar();  //接收输入的字符
getchar();   //接受‘/n’
if(c=='a')
printf("Saturday.\n");
else if(c=='u')
printf("Sunday.\n");
else
printf("error data.\n");break;
case 'M':
printf("Monday.\n");break;
case 'T':
printf("please enter the second number:\n");
c=getchar();
getchar();
if(c=='u')
printf("Tuesday.\n");
else if(c=='h')
printf("Thursday.\n");
else
printf("error data.\n");break;
case 'W':printf("Wednesday.\n");break;
case 'F':printf("Friday.\n");break;
default:printf("error input.\n");
}

return 0;
}

[ 本帖最后由 XiaoXiao_Ren 于 2013-8-8 00:30 编辑 ]

收到的鲜花

• 小武哥253 于 2013-08-08 17:35 送鲜花  3朵   附言：我很赞同