Overload the - relative to MyClass class 1.

  

#include <iostream>
using namespace std;

class MyClass {
  int x, y; 
public:
  MyClass() { 
     x=0; 
     y=0; 
  }
  MyClass(int i, int j) { 
     x=i; 
     y=j; 
  }
  void getXY(int &i, int &j) { 
     i=x; 
     j=y; 
  }
  MyClass operator-(MyClass object2); // binary minus
  MyClass operator-();              // unary minus
};

MyClass MyClass::operator-(MyClass object2)
{
  MyClass temp;

  temp.x = x - object2.x;
  temp.y = y - object2.y;

  return temp;
}

// Overload unary - for MyClass class.
MyClass MyClass::operator-()
{
  x = -x;
  y = -y;
  return *this;
}

int main()
{
  MyClass object1(10, 10), object2(5, 7);
  int x, y;

  object1 = object1 - object2;                // subtraction
  object1.getXY(x, y);
  cout << "(object1-object2) X: " << x << ", Y: " << y << endl;

  object1 = -object1;                    // negation
  object1.getXY(x, y);
  cout << "(-object1) X: " << x << ", Y: " << y << endl;

  return 0;
}

Related examples in the same category

1.	Demo: Overload the +, -, and = relative to MyClass.
2.	overload the - operator
3.	Overload - (subtraction) so that it removes the first occurrence of the substring on the right from the string on the left and returns the result.

Overload the - relative to MyClass class 1. : Minus « Overload « C++

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