Copy Constructor Basic Example in C++

This code defines a class Constructor that has an integer x as a data member and two constructors. The first constructor takes an integer argument a and initializes x to it. The second constructor takes a reference to an object of the same class type and initializes x to the value of x in the object being passed as argument. In the main function, an object a1 is created using the first constructor with the argument 20. Another object a2 is created using the second constructor with the argument a1, which makes a copy of a1 and initializes a2 with its value. Finally, the value of x in a2 is printed to the console. When the program is executed, it will print the value 20 to the console, which is the value of x in a2.

Source Code

#include<iostream>
using namespace std;
class Constructor
{
   public:
    int x;
    Constructor(int a)
    {
       x=a;
    }
    Constructor(Constructor &i)
    {
       x=i.x;
    }
};
int main()
{
  Constructor a1(20);
  Constructor a2(a1);
  cout<<a2.x;
  return 0;
}

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