6-13

#include<iostream>

using namespace std;
class Point
{
public:
    Point(int x=0,int y=0):x(x),y(y){}
    int getX() const {return x;}
    int getY() const {return y;}
private:
    int x,y;
};
int main()
{
    Point a(4,5);
    Point * p1=&a;

    int (Point::*funcPtr)() const=&Point::getX;

    cout<<(a.*funcPtr)()<<endl;
    cout<<(p1->*funcPtr)()<<endl;
    cout<<a.getX()<<endl;
    cout<<p1->getX()<<endl;

    return 0;
}