Operator overloading in C++ with code example

Operator overloading

Operator overloading is a technique in C++ where we overload an operator. Here operators are <,>,>=, <= or  =.

The true concept about operator overloading is that using operator overloading scheme we manipulate or interact two objects  . For example we add the attributes of two different objects etc.

I give an example to understand the overloading concept

In this example, two different distances belong to two different objects and they are added through operator overloading

#include<iostream>

using namespace std;

class distancee

{ private:

int feet;

float inches;

public:

       distancee( ):feet(0),inches(0.0)

            { }

      distancee(int ft,float in) : feet(ft),inches(in)

      {  }

     

      void getdist()

      {

            cout<<"enter feet";

            cin>>feet;

            cout<<"enter inches";

            cin>>inches;

      }

      void showdist() const

      { cout<<feet<<inches<<endl; }

      void operator +=(distancee);

};

void distancee::operator += (distancee d2)

{

      feet += d2.feet;

      inches +=d2.inches;

      if(inches >= 12.0)

      {

            inches -= 12.0;

            feet++;

      }

};

int main()

{

      distancee dist1;

      dist1.getdist();

      cout<<"dist1";

      dist1.showdist();

      distancee dist2(11,6.35);

      cout<<"dist2";

      dist2.showdist();

      dist1+=dist2;

      cout<<"after addition";

      cout<<"dist1";

      dist1.showdist();

      cout<<endl;

      return 0;

}

In this code here we manipulate two different objects attributes together

feet += d2.feet;

       inches +=d2.inches;

       if(inches >= 12.0)

       {

              inches -= 12.0;

              feet++;}

Here:

feet and d2.feet indicates two different objects values