Coordinate.cpp

#include "Coordinate.h"

Coordinate::Coordinate(){
  this->x = 0;
  this->y = 0;
}
Coordinate::Coordinate( int x, int y ){
  this->x = x;
  this->y = y;
}
Coordinate& Coordinate::operator += ( const Coordinate& b ){
  return *this;
}
Coordinate& Coordinate::operator /= ( const int& b ){
  return *this;
}
inline Coordinate operator + ( Coordinate a, const Coordinate& b ){
  return Coordinate( a.x + b.x, a.y + b.y );
}
inline Coordinate operator / ( Coordinate a, const int& b ){
  return Coordinate( a.x / b, a.y / b );
}

Coordinate.h

#ifndef Coordinate_H
#define Coordinate_H

struct Coordinate {
  Coordinate();
  Coordinate( int x, int y );

  Coordinate& operator += ( const Coordinate& b );
  Coordinate& operator /= ( const int& b );

  int x, y;
};
inline Coordinate operator + ( Coordinate a, const Coordinate& b );
inline Coordinate operator / ( Coordinate a, const int& b );

#endif

tests.cpp

#include <iostream>

#include "Coordinate.h"

int main(){
  Coordinate a( 2, 2 ), b( 3, 4 );
  
  std::cout << ( a + b ).x << "\n";

  return 0;
}