Overloading the Increment and Decrement Operators - C++ Class

C++ examples for Class:Operator Overload

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Description

Overloading the Increment and Decrement Operators

Demo Code

#include <iostream>

using namespace std;

class MyClass {/* w ww  .  j  a  v  a  2 s. c  o m*/
public:
   MyClass() : score_(0) {}
   MyClass(int i) : score_(i) {}

   MyClass& operator++() { // prefix
      ++score_;
      return(*this);
   }
   const MyClass operator++(int) { // postfix
      MyClass tmp(*this);

      ++(*this); // Take advantage of the prefix operator
      return(tmp);
   }
   MyClass& operator--() {
      --score_;
      return(*this);
   }
   const MyClass operator--(int x) {
      MyClass tmp(*this);
      --(*this);
      return(tmp);
   }
   int getScore() const {return(score_);}

private:
   int score_;
};

int main() {
   MyClass player1(50);

   player1++;
   ++player1; // score_ = 52
   cout << "Score = " << player1.getScore() << '\n';
   (--player1)--; // score_ = 50
   cout << "Score = " << player1.getScore() << '\n';
}

Result


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