Demo overload 01

overload01.cpp

// This program demonstrates how to overload
// the post-increment operator
// https://gist.github.com/3399944

#include <iostream>
#include <string>
using namespace std;


class Fraction {
private: 
   int n,d;   // n: numerator, d:denominator
public:
   Fraction();    
   Fraction(int, int);
   Fraction operator++(int);
   void display();
};

Fraction Fraction::operator ++(int) { 
    Fraction tmp(n,d);
    n = n + d;
    return tmp;
}

void Fraction::display(){
    cout << n << " / " << d << endl;
}

// Class implementation
Fraction::Fraction() {
    n = d = 0;
}

Fraction::Fraction(int myN, int myD) {
    n = myN; d = myD;
}

//
// Main function
//

int main() {
   Fraction F1(1,2); 
   Fraction F2;
   F2 = F1++;
   F1.display();
   F2.display();
   return 0;
}