取模运算符是% ，对负数取模不一定都是正数。例如：例一：int main(){int x;x = -6%5; printf("%2d/n",x);x = 6%-5; printf("%2d/n",x);x = 1%-5; printf("%2d/n",x);x = -1%-5; printf("%2d/n",x);x = -6%-5; printf("%2d/n",x);} 运行结果为：-1、...