C++ LANGUAGE ASSIGNMENT OPERATORS OVERLOADING

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C++ LANGUAGE ASSIGNMENT OPERATORS OVERLOADING

Assignment Operators Overloading 


You can overload the assignment operator (=) just as you can 
other operators and it can be used to create an object just like the copy constructor.
 
Following example explains how an assignment operator can be overloaded. 

#include <iostream> 
using namespace std; 
  
class Distance 
{ 
   private: 
      int feet;             // 0 to infinite 
      int inches;           // 0 to 12 
   public: 
      // required constructors 
      Distance(){ 
         feet = 0; 
         inches = 0; 
      } 
      Distance(int f, int i){ 
         feet = f; 
         inches = i; 
      } 
      void operator=(const Distance &D ) 
      {  
         feet = D.feet; 
         inches = D.inches; 
      } 
      // method to display distance 
      void displayDistance() 
      { 
         cout << "F: " << feet <<  " I:" <<  inches << endl; 
      } 
       
}; 
int main() 
{ 
   Distance D1(11, 10), D2(5, 11); 
 
   cout << "First Distance : ";  
   D1.displayDistance(); 
   cout << "Second Distance :";  
   D2.displayDistance(); 
 
   // use assignment operator 
   D1 = D2; 
   cout << "First Distance :";  
   D1.displayDistance(); 
 
   return 0; 
} 
When the above code is compiled and executed, 
it produces the following result: 

First Distance : F: 11 I:10 
Second Distance :F: 5 I:11 
First Distance :F: 5 I:11