C ++ assignment operator overloading

C ++ function overloading and operator overloading

Like other operators, you can overload the assignment operator (=) is used to create an object, such as a copy constructor.

The following example shows how to overload the assignment operator.

#include <iostream>
using namespace std;
 
class Distance
{
   private:
      int feet;             // 0 到无穷
      int inches;           // 0 到 12
   public:
      // 所需的构造函数
      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;
      }
      // 显示距离的方法
      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();

   // 使用赋值运算符
   D1 = D2;
   cout << "First Distance :"; 
   D1.displayDistance();

   return 0;
}

When the above code is compiled and executed, it produces the following results:

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

C ++ function overloading and operator overloading