编辑代码

#include <stdio.h>
int main () {
    unsigned short a=0xffff,b=0xffff;
    a++;
    if(a!=(b+1))
    {
    printf("err1\n");
    }
    if((unsigned short)a!=(unsigned short)(b+1))
    {
    printf("err2\n");
    }
    return(0);
}