#include<iostream>

using namespace std;

? ?class Coordinate

{

friend void display(Coordinate &coor);

public:

Coordinate(int x, int y)

{

x = m_iX;

y = m_iY;

}

private:

int m_iX;

int m_iY;

};

void display(Coordinate &coor)

{

cout << "m_iX:"<< coor.m_iX << endl;

cout << "m_iY:"<< coor.m_iY << endl;

}

int main(void)

{

Coordinate coor(7, 9);

display(coor);

return 0;

}

m_iX:-858993460

m_iY:-858993460

請按任意鍵繼續. . .