// constructure example
#include<iostream.h>
#include<conio.h>
class demo
{
public : demo()
{
cout<<"Hello...";
}
};
void main()
{
clrscr();
demo d1;
getch();
}

----OUTPUT----
Hello...

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

----OUTPUT----
Hello...
Add= 7