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//Title of this code

#include <iostream>
using namespace std;

class Coordinate
{
private:
	int m_Row, m_Column;
public:
	Coordinate(int row, int column) : m_Row(row), m_Column(column) {}
	~Coordinate(void);

int row() const { return this->m_Row; }
	int column() const { return this->m_Column; }

Coordinate& operator+= (const Coordinate& rhs);
	Coordinate& operator-= (const Coordinate& rhs);
};

inline Coordinate operator + (Coordinate lhs, const Coordinate& rhs) { return lhs += rhs; }
inline Coordinate operator - (Coordinate lhs, const Coordinate& rhs) { return lhs -= rhs; }
// inline Coordinate abs(const Coordinate& val)  { return Coordinate( abs(val.row()), abs(val.column()) ); }

int main()
{
    Coordinate c1(2,3), c2(5,8);
    Coordinate c3 = c1 + c2;
    Coordinate c4 = (c1 += c2);
    cout << "Sum: " << c3.row() << " " << c3.column() << endl;
    cout << "Sum += : " << c4.row() << " " << c4.column();
}

Coordinate::~Coordinate(void)
{
}

Coordinate& Coordinate :: operator+= (const Coordinate& rhs){
	this->m_Row += rhs.m_Row;
	this->m_Column += rhs.m_Column;

return *this;
}

Coordinate& Coordinate :: operator-= (const Coordinate& rhs){
	this->m_Row -= rhs.m_Row;
	this->m_Column -= rhs.m_Column;

return *this;
}

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Compilation time: 0.75 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 2 Mb, absolute service time: 1.13 sec