min和max函数

#include<iostream>
using namespace std;
bool cmp(const int &a,const int &b)
{
    return (a > b) ;
}
int main(void)
{
    int a = -999, b = 100 ;
    cout << min(a, b) << endl ;
    cout << min(a, b, cmp) << endl ;
    cout << max(a, b) << endl ;
    cout << max(a, b, cmp) << endl ;
    return 0;
}