Constructor Overloading in C++

Implementation for Constructor Overloading

#include <iostream>
using namespace std;
class Demo
{
  int x, y;
  public:
    Demo()
    {
       x = 0;
       y = 0;
    }
    Demo(int x1, int y1)
    {
      x = x1;
      y = y1;
    }
    Demo(int x1)
    {
     x = x1;
     y = x1;
    }

    void print()
    {
    cout<<"\nValues are : "<<x<<" and "<<y ;
    }
};

int main()
{
  Demo d1;
  Demo d2(10,20);
  Demo d3(10);

  d1.print();
  d2.print();
  d3.print();
  return 0;
}

Output –

Values are : 0 and 0
Values are : 10 and 20
Values are : 10 and 10

In the above example, depending upon the parameters passed( similar as function overloading), the appropriate constructor was called, this is the basic functionality of constructor overloading.