// constructure example
#include<iostream.h>
#include<conio.h>
class demo
{
public :
demo()
{
cout<<"Hello...";
}
demo (int a,int b)
{
int ans;
ans=a+b;
cout<<"\nAdd="<<ans;
}
demo (int a,int b,int c)
{
int ans;
ans=a+b+c;
cout<<"\nAdd="<<ans;
}
};
void main()
{
clrscr();
demo d1;
demo d2(2,4);
demo d3(4,5,6);
getch();
}

/*
----OUTPUT----
Hello...
Add= 6
Add= 15
*/