Untitled

#include<iostream>
#include<conio.h>
using namespace std;
class A
{
public:
int len;
void length()
{
cout<<"\n\nlength:::\t";
cin>>len;
}
};
class B:public A
{
public:
int b,c;
void l_into_b()
{
length();
cout<<"\n\nBsreadth:::\t";
cin>>b;
c=b*len;
}
};
class C
{
public:
int h;
void height()
{
cout<<"\n\nheight:::\t";
cin>>h;
}
};
class D:public B,public C
{
public:
int res;
void result()
{
l_into_b();
height();
res=h*c;
cout<<"\n\nresult(len*b*h):::\t"<<res;
}
};
int main()
{
D d1;
d1.result();
getch();
}