C++ Programming Code Examples C++ > Beginners Lab Assignments Code Examples Operator Overloading of Decrement -- Operator Operator Overloading of Decrement -- Operator In this tutorial, increment ++ and decrements -- operator are overloaded in best possible way, i.e., increase the value of a data member by 1 if ++ operator operates on an object and decrease value of data member by 1 if -- operator is used. Decrement operator can be overloaded in similar way as increment operator. Also, unary operators like: !, ~ etc can be overloaded in similar manner. #include <iostream> using namespace std; class Check { private: int i; public: Check(): i(3) { } Check operator -- () { Check temp; temp.i = --i; return temp; } // Notice int inside barcket which indicates postfix decrement. Check operator -- (int) { Check temp; temp.i = i--; return temp; } void Display() { cout << "i = "<< i <<endl; } }; int main() { Check obj, obj1; obj.Display(); obj1.Display(); // Operator function is called, only then value of obj is assigned to obj1 obj1 = --obj; obj.Display(); obj1.Display(); // Assigns value of obj to obj1, only then operator function is called. obj1 = obj--; obj.Display(); obj1.Display(); return 0; }
