Point Class Operators, plus and subtract - C++ Class

C++ examples for Class:Operator Overload

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Description

Point Class Operators, plus and subtract

Demo Code

#include <iostream>
using namespace std;
class Point {/*  w  ww.  j ava  2  s . c  om*/
   private:                      // Data members (private)
   int x, y;
   public:              // Constructors
   Point() {set(0,0);}
   Point(int new_x, int new_y) {set(new_x, new_y);}
   Point(const Point &src) {set(src.x, src.y);}
   // Operations
   Point add(const Point &pt);
   Point sub(const Point &pt);
   Point operator+(const Point &pt) {return add(pt);}
   Point operator-(const Point &pt) {return sub(pt);}
   // Other member functions
   void set(int new_x, int new_y);
   int get_x() const {return x;}
   int get_y() const {return y;}
};
int main()
{
   Point point1(20, 20);
   Point point2(0, 5);
   Point point3(-10, 25);
   Point point4 = point1 + point2 + point3;
   cout << "The point is " << point4.get_x();
   cout << ", " << point4.get_y() << "." << endl;
   return 0;
}
void Point::set(int new_x, int new_y) {
   if (new_x < 0) {
      new_x *= -1;
   }
   if (new_y < 0) {
      new_y *= -1;
   }
   x = new_x;
   y = new_y;
}
Point Point::add(const Point &pt) {
   Point new_pt;
   new_pt.x = x + pt.x;
   new_pt.y = y + pt.y;
   return new_pt;
}
Point Point::sub(const Point &pt) {
   Point new_pt;
   new_pt.x = x - pt.x;
   new_pt.y = y - pt.y;
   return new_pt;
}

Result


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