关于取模，我用的是VC6.0：
代码：
#include<stdio.h>
int main(void)
{
    printf("11/5 is %d and 11%5 is %d\n",11/5,11%5);
    printf("11/-5 is %d and 11%-2 is %d\n",11/-5,11%-2);
    printf("-11/-5 is %d and -11%-5 is %d\n",-11/-5,-11%-5);
    printf("-11/5 is %d and -11%5 is %d\n",-11/5,-11%5);
    return 0;
}
运行结果如下：
11/5 is 2 and 11 is 1
11/-5 is -2 and 11 is 1
-11/-5 is 2 and -11 is -1
-11/5 is -2 and -11 is -1
为什么不是：
11/5 is 2 and 11%5 is 1
11/-5 is -2 and 11%-2 is 1
-11/-5 is 2 and -11%-5 is -1
-11/5 is -2 and -11%5 is -1
我该了代码后：
#include<stdio.h>
int main(void)
{
    printf("11/5 is %d and 11%%5 is %d\n",11/5,11%5);
    printf("11/-5 is %d and 11%%-2 is %d\n",11/-5,11%-2);
    printf("-11/-5 is %d and -11%%-5 is %d\n",-11/-5,-11%-5);
    printf("-11/5 is %d and -11%%5 is %d\n",-11/5,-11%5);
    return 0;
}
结果却变成：
11/5 is 2 and 11÷5 is 1
11/-5 is -2 and 11÷-2 is 1
-11/-5 is 2 and -11÷-5 is -1
-11/5 is -2 and -11÷5 is -1

实在搞不懂啥原因啊，请各位指教指教，先谢谢了。
已找到原因，输出显示的%太小，自己误看成÷了，实属不该啊，以后仔细点。

[ 本帖最后由 aiyameili 于 2014-3-21 22:12 编辑 ]

已找到原因，输出显示的%太小，自己误看成÷了，实属不该啊，以后仔细点。