#include <iostream>
#include <cmath>

const double PI = 3.14159;

class Shape {
public:
    virtual double calculateVolume() const = 0; // Virtual function to calculate volume
};

class Cube : public Shape {
private:
    double side;

public:
    Cube(double s) : side(s) {}

    double calculateVolume() const override {
        return side * side * side; // Volume of a cube formula
    }
};

class Cuboid : public Shape {
private:
    double length;
    double width;
    double height;

public:
    Cuboid(double l, double w, double h) : length(l), width(w), height(h) {}

    double calculateVolume() const override {
        return length * width * height; // Volume of a cuboid formula
    }
};

class Cylinder : public Shape {
private:
    double radius;
    double height;

public:
    Cylinder(double r, double h) : radius(r), height(h) {}

    double calculateVolume() const override {
        return PI * pow(radius, 2) * height; // Volume of a cylinder formula
    }
};

int main() {
    Cube cube(5.0);
    Cuboid cuboid(4.0, 6.0, 3.0);
    Cylinder cylinder(2.5, 7.0);

    Shape* shapes[] = { &cube, &cuboid, &cylinder };

    for (const auto& shape : shapes) {
        std::cout << "Volume: " << shape->calculateVolume() << std::endl;
    }

    return 0;
}