#include<iostream>
using namespace std;
class rectangle
{
private:
int length;
int breadth;
public:
rectangle(int r=0, int b=0);
int getlength;
int getbreadth;
void setlength(int l);
void setbreadth(int b);
int area();
int perimeter();
};
class cuboid:public rectangle
{
private:
int height;
public:
cubiod(int L=0,int b=0,int h=0)
{
height=h;
setlength(L);
setbreadth(b);
}
int getheight();
void setheigth(int h);
int volume()
{
return getlength()*getbreadth()*heigth;
}
};
int main()
{
cubiod c(10,20,30);
cout<<c.getlength();
cout<<c.volume();
cout<<c.area();
cout<<c;
}
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