阅读程序4

#include <iostream>
using namespace std;
class Pair
{
    int m;
    int n;
public:
    Pair(int i,int j):m(i),n(j){}
    bool operator>(Pair p)const;
};
bool Pair::operator>(Pair p)const
{
    if(m!=p.m)
        return m>p.m;
    return n>p.n;
}
int main()
{
   Pair p1(3,4),p2(4,3),p3(4,5);
   cout<<(p1>p2)<<(p2>p1)<<(p2>p3)<<(p3>p2)<<endl;
    return 0;
}