#include<iostream>
using namespace std;
class A
{
protected:
int no;
public:
void get_no(int);
};
void A:: get_no(int x)
{
no=x;
}
class B:public A
{
public:
void square()
{
cout<<"the square of this number is:"<<no*no<<endl;
}
};
class C:public A
{
public:
void cube()
{
cout<<"the cube of this number is:"<<no*no*no<<endl;
}
};
int main()
{
A o;
C obj;
B obj2;
o.get_no(10);
obj.cube();
obj2.square();
}
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