Overloading Increment/Decrement Operators Using Friend Functions

  Friend functions can be used to overload Prefix and Postfix forms of Increment/Decremnt operators in C++. Sample output and code are shown below. 

Figure Below Shows a Sample Output

#include<iostream>

using namespace std;

class over_load
{
    int n1,n2;
    public:
    void set(int x, int y)
    {
        n1=x;
        n2=y;
    }
    void show()
    {
        cout<<"\nNumber 1 is "<<n1<<"\n";
        cout<<"\nNumber 2 is "<<n2<<"\n";
    }
    friend over_load operator++(over_load &ob)
    {
        ob.n1++;
        ob.n2++;
        cout<<"\nPost Incremnt Operator Overloaded\n";
    }
    friend over_load operator++(over_load &ob, int x)
    {
        ++ob.n1;
        ++ob.n2;
        cout<<"\nPre Increment Operator Overloaded\n";
    }
};

int main()
{
  over_load ob1;
  ob1.set(100,200);
  cout<<"\nObejct ob1 Initially:\n";
  ob1.show();
  ob1++;
  ob1.show();
  ++ob1;
  ob1.show();
  return 0;
}

Click here to download the C++ Program.