#include <stdio.h>
int main()
{
    int x,y;
    x = 10;
    y = -3;
    printf("x+y=%d\n",x+y);  
    printf("x-y=%d\n",x-y);
    printf("x*y=%d\n",x*y);
    printf("x/y=%d\n",x/y);
    printf("x%y=%d\n",x%y);  
    return 0;    
} 这窜代码 在这里我怎么运行是错的?
#include <stdio.h>
int main()
{
    int x,y;
    x = 10;
    y = -3;
    printf("x+y=%d\n",x+y);  
    printf("x-y=%d\n",x-y);
    printf("x*y=%d\n",x*y);
    printf("x/y=%d\n",x/y);
    printf("x%%y=%d\n",x%y);  
    return 0;    
}
要想输出x%y,在printf里面需要多加一个%,这涉及到转义字符的知识http://www.cnblogs.com/emanlee/archive/2010/04/26/1721275.html