以下程序vc6.0正常运行，在visual studio2010上说重载有问题，请指正！！！！
#include <iostream>
#include <cmath>
using namespace std;

class Point
{
public:
    Point(){x=0;y=0;}
    Point(int X,int Y);
    int GetX(){return this->x;}
    int GetY(){return this->y;}
    double Distance() ;

private:
    int x,y;
};

Point::Point(int X,int Y){x=X;y=Y;}

double Point::Distance() {double dis; dis=sqrt(x*x+y*y); return dis;}

void main()
{
        Point p0;

    cout<<p0.GetX()<<","<<p0.GetY()<<endl;
    cout<<p0.Distance()<<endl;
   
   
    int m,n;
    cin>>m>>n;
    Point p1(m,n);

    cout<<p1.GetX()<<","<<p1.GetY()<<endl;
    cout<<p1.Distance()<<endl;
   
}

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原因是什么？