#include <iostream>

using namespace std;

/**

 * 定义Coordinate类

 * 数据成员：m_iX，m_iY

 * 成员函数：构造函数

 * 重载--运算符，重载+运算符

 */

class Coordinate;

class Coordinate

{

public:

    Coordinate(int x, int y)

{

m_iX = x;

m_iY = y;

}

    // 前置--运算符重载

Coordinate &operator--()

{

    m_iX--;

m_iY--;

return *this;

}

    // 后置--运算符重载

     Coordinate operator--(int)

{

Coordinate temp(*this);

temp.m_iX=m_iX++;

temp.m_iY=m_iY++;

return temp;

}

    // +号运算符重载

Coordinate operator+(Coordinate a)

{

 Coordinate b(0,0);

b.m_iX=a.m_iX+this->m_iX;

b.m_iY=a.m_iY+m_iY;

return b;

}

public:

int m_iX;

int m_iY;

};

int main(void)

{

Coordinate coor1(1, 3);

Coordinate coor2(2, 4);

Coordinate coor3(0, 0);

coor1--;

--coor2;

coor3 = coor1 + coor2;

cout << coor3.m_iX << endl;

cout << coor3.m_iY << endl;

return 0;

}