69,371
社区成员
发帖
与我相关
我的任务
分享
#include<stdio.h>
#define IS(a) (a>=0 && ~a>=0)
int main()
{
int c = 4;
unsigned int b = 5;
char d = 6;
unsigned char e = 7;
printf("int=%d\n",IS(c));
printf("uint=%d\n",IS(b));
printf("char=%d\n",IS(d));
printf("uchar=%d\n",IS(e));//这句有警告
}