#include<bits/stdc++.h>

using namespace std;

//Class is a blue print of a data type;

//eg BOX is blue print of data type having box length ,breadth, hieght it does not include any function;

//Class have three type of members

// private members of a class are accessible only from within other members of the same class (or from their "friends").

// protected members are accessible from other members of the same class (or from their "friends"), but also from members of their derived classes.

// Finally, public members are accessible from anywhere where the object is visible.

class BOX{

public:

int length;

int breadth;

int hieght;

};

//Class Rectangle having function set_values() and area() and two private member width and breadth;

class Rectangle{

int width,breadth;

public:

void set_values(int,int); //Prototype of function in class

int area(){return width*breadth;}

};

// Declaring function

void Rectangle::set_values(int x,int y){

width = x;

breadth=y;

}

//set_values function can easily be avoid by using constructor

//Constructor is nothing but is a function member of class having none of return type even not void and same name as class

//Let's make Triangle using constructor

class Triangle{

int base,prep,hyp;

public:

Triangle(int,int,int); //Constructor

int area(){return base*prep*hyp;}

};

Triangle::Triangle(int x, int y, int z){

base = x;

prep = y;

hyp = z;

}

int main(){

BOX box1;

cin>>box1.length>>box1.breadth>>box1.hieght;

cout<<box1.length<<" "<<box1.breadth<<" "<<box1.hieght<<endl;

cout<<"Volume of box1 is: "<<box1.length * box1.breadth * box1.hieght<<endl;

Rectangle rect;

rect.set_values(4,5);

cout<<rect.area()<<endl;

Triangle tri(3,4,5);

cout<<tri.area()<<endl;

}