copy constructer

//
#include<stdio.h>
#include<conio.h>
#include<iostream.h>
class demo
{
	long int n1,n2;
	public:
		demo(long int x)
		{
			n1=x;

		}
		demo(demo &a1,demo &a2)
		{
			cout<<"\n======================================";
			if(a1.n1==a2.n1)
			{
				cout<<"\n BOTH numbers are SAME";
			}
			else
			{
				if(a1.n1>a2.n1)
				{
					cout<<"\nBig number is ==>  "<<a1.n1;
				}
				else
				{
					cout<<"\nBig number is ==>  "<<a2.n1;
				}
			}

		}
		void dis()
		{
			cout<<"\n ===============";
			cout<<"\n n1 ==> "<<n1 ;

		}

};

int main()
{

	long int a,b;

	clrscr();
	cout<< "\nobj a1: Enter number 1 => ";
	cin>>a;

	cout<< "\n\nobj a2: Enter number 1 => ";
	cin>>b;
	//call of obj a1
	demo a1(a);

	//call of obj a2
	demo a2(b);

	cout<<"\na1 object's output";
	//call of display obj a1
	a1.dis();

	cout<<"\n\na2 object's output";
	//call of display obj a2
	a2.dis();

	//call of obj a3
	demo a3(a1,a2);

	getch();

	return 0;
}