Overloading the Addition Operator, + - C++ Class

C++ examples for Class:Operator Overload

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Description

Overloading the Addition Operator, +

Demo Code

                                                    
#include <iostream> 
                                                      
class Counter //w ww  .j a v a 2 s  .  c  o m
{ 
public: 
    Counter(); 
    Counter(int initialValue); 
    ~Counter(){} 
    int getValue() const { return value; } 
    void setValue(int x) { value = x; } 
    Counter operator+(const Counter&); 
                                                       
private: 
    int value; 
}; 
                                                       
Counter::Counter(int initialValue): 
value(initialValue) 
{} 
                                                     
Counter::Counter(): 
value(0) 
{} 
                                                     
Counter Counter::operator+(const Counter &rhs) 
{ 
    return Counter(value + rhs.getValue()); 
} 
                                                     
int main() 
{ 
    Counter alpha(4), beta(13), gamma; 
    gamma = alpha + beta; 
    std::cout << "alpha: " << alpha.getValue() << std::endl; 
    std::cout << "beta: " << beta.getValue() << std::endl; 
    std::cout << "gamma: " << gamma.getValue()  
           << std::endl; 
    return 0; 
}

Result


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