【求助】关于拷贝构造函数的调用顺序问题

#include<iostream>
#include<math.h>
using namespace std;
class Point
{
public:
    Point(int xx=0,int yy=0)
    {X=xx;Y=yy;cout<<"point构造函数被调用"<<endl;}
    Point(Point &p);
    int GetX()
    {return X;}
    int GetY()
    {return Y;}
private:
    int X,Y;
};
Point::Point(Point &p)
{
    X=p.X;
    Y=p.Y;
    cout<<"X="<<X<<"Y="<<Y<<"Point拷贝构造函数被调用"<<endl;
}
class Distance
{
public:
    Distance(Point xp1,Point xp2);
    double GetDis(){return dist;}
private:
    Point p1,p2;
    double dist;
};
Distance::Distance(Point xp1,Point xp2):p1(xp1),p2(xp2)
{
    cout<<"Distance构造函数被调用"<<endl;
    double x=double(p1.GetX()-p2.GetX());
    double y=double(p1.GetY()-p2.GetY());
    dist=sqrt(x*x+y*y);
}
void main()
{
    Point myp1(1,1),myp2(4,5);
    Distance myd(myp1,myp2);
    cout<<"The distance is:";
    cout<<myd.GetDis()<<endl;
    system("pause");
}