#include <stdio.h>
void main()
{
    char answer;
    printf("Where does light come from?\n");
    printf("a>the sun\n b>themoon\n c>Jupiter\n d>Mars\n");
    printf("\nPress a/b/c/d to indicate your answer\n");
    scanf("%c",&answer);
    if(answer=="a")
        printf("you are right");
    else
        printf("game over");
}
*******************************************************************************
Compiling...
Cpp1.cpp
D:\Program Files\class\新建文件夹 (5)\Cpp1.cpp(9) : error C2446: '==' : no conversion from 'char *' to 'int'
        This conversion requires a reinterpret_cast, a C-style cast or function-style cast

Cpp1.obj - 1 error(s), 0 warning(s)

#include <stdio.h>
 void main()
 {
     char answer;
     printf("Where does light come from?\n");
     printf("a>the sun\n b>themoon\n c>Jupiter\n d>Mars\n");
     printf("\nPress a/b/c/d to indicate your answer\n");
     scanf("%c",&answer);
     if(answer=='a')
         printf("you are right \n");
     else
         printf("game over\n");
 }
这样就可以了，注意“” ‘’的区别

if用单引号？

我知道了，谢谢啊

不是这个 是字符和字符串 你没有清楚认识

正解！！

哦，我在在书上看看。

厉害啊