Untitled

#include<iostream>
using namespace std;
class top
{
	public:
		int a;
		void getdata()
		{
			cout<<"\n\n Enter First Number IS:::\t";
			cin>>a;
		}
		void putdata()
		{
			cout<<"\n First Nuber Is :::\t"<<a;
		}
};
class middle:public top 
{
	public:
		int b;
		void square()
		{
			getdata();
			b=a*a;
			cout<<"\n\nsquarels:::"<<b;
		}
};
class bottom :public middle
{
	public:
		int c;
		void cube()
		{
			square();
			c=b*a;
			cout<<"\n\ncube:::\t"<<c;
		}
};
int main()
{
	bottom b1;
	b1.cube();
}