今天面试遇到的题

#include <stdio.h>

int squar(volatile int *p){
    return *p * *p;
}
int main()
{
    /*
    int a[]={1,2,11,4};
    int *p;
    p = a;
    p+=2;
    printf("%d\n",*p);*/
    unsigned int a = 6;
    int b = -20;
//    (a + b > 6)?(puts(">=6")):puts("<=6");

//    printf("%d\n",(a+b));

/*
    int c = a + b>6;
    printf("%d",a + b>6);*/
//    printf("%d",squar(5));

    int aa = 4;
    int *p = &aa;
    printf("%d",squar(p));
    return 0;
}