Question

Write most basic C++ program possible that calculates volume and surface area of five shapes (Cube, Sphere, Prism, Cylinder, Cone), where each shape has its own class (with a volume function, surface area function, constructor, as well as get and set functions), and the shape dimensions are private class members. Include input and display functions.

Answer 1

The code is given below:

#include <iostream>
#include <conio.h>
#include <math.h>
using namespace std;

class Cube   //Class Cube
{
        private: float s;
        public:

                float getVolume()
                {
                        return (s *s *s);
                }

        float getSurfaceArea()
        {
                return (6 *s *s);
        }

        Cube() {}

        void setter(float x)
        {
                s = x;
        }

        void getter()
        {
                cout << "Length: " << s << endl;
        }

        void display(float d1, float d2)
        {
                cout << "The Volume of the cube: " << d1 << "cm3" << endl;
                cout << "The Surface Area of the cube: " << d2 << "cm²" << endl;
        }

        float input()
        {
                float i;
                cout << "Enter the side of cube: ";
                cin >> i;
                return i;
        }
};

class Sphere  //Class Sphere
{
        private: float d;
        public:

                float getVolume()
                {
                        return ((3.14 *d *d *d) / 6);
                }

        float getSurfaceArea()
        {
                return (3.14 *d *d);
        }

        Sphere() {}

        void setter(float x)
        {
                d = x;
        }

        void getter()
        {
                cout << "Diameter: " << d << endl;
        }

        void display(float d1, float d2)
        {
                cout << "The Volume of the sphere: " << d1 << "cm3" << endl;
                cout << "The Surface Area of the sphere: " << d2 << "cm²" << endl;
        }

        float input()
        {
                float i;
                cout << "Enter the diameter of sphere: ";
                cin >> i;
                return i;
        }
};

class Prism   //Class Prism
{
        private: float a, b, c, h3, l;
        public:

                float getVolume()
                {
                        return (((b *h3) / 2) *l);
                }

        float getSurfaceArea()
        {
                return (((a + b + c) *l) + (b *h3));
        }

        Prism() {}

        void setter(float v, float w, float x, float y, float z)
        {
                a = v;
                b = w;
                c = x;
                h3 = y;
                l = z;
        }

        void getter()
        {
                cout << "Side a: " << a << endl;
                cout << "Side b: " << b << endl;
                cout << "Side c: " << c << endl;
                cout << "Height: " << h3 << endl;
                cout << "Length: " << l << endl;
        }

        void display(float d1, float d2)
        {
                cout << "The Volume of the cube: " << d1 << "cm3" << endl;
                cout << "The Surface Area of the cube: " << d2 << "cm²" << endl;
        }
};
class Cylinder   //Class Cylinder
{
        private: float r, h;
        public:

                float getVolume()
                {
                        return (3.14 *r *r *h);
                }

        float getSurfaceArea()
        {
                return ((2 * 3.14 *r *h) + (2 * 3.14 *r *r));
        }

        Cylinder() {}

        void setter(float x, float y)
        {
                r = x;
                h = y;
        }

        void getter()
        {
                cout << "Radius: " << r << endl;
                cout << "Height: " << h << endl;
        }

        void display(float d1, float d2)
        {
                cout << "The Volume of the cylinder: " << d1 << "cm3" << endl;
                cout << "The Surface Area of the cylinder: " << d2 << "cm²" << endl;
        }
};

class Cone  //Class cone
{
        private: float r2, h2;
        public:

                float getVolume()
                {
                        return ((3.14 *r2 *r2 *h2) / 3);
                }

        float getSurfaceArea()
        {
                float val1 = h2 *h2 + r2 * r2;
                float val2 = sqrt(val1);
                return (3.14 *r2 *(r2 + val2));
        }

        Cone() {}

        void setter(float x, float y)
        {
                r2 = x;
                h2 = y;
        }

        void getter()
        {
                cout << "Radius: " << r2 << endl;
                cout << "Height: " << h2 << endl;
        }

        void display(float d1, float d2)
        {
                cout << "The Volume of the cone: " << d1 << "cm3" << endl;
                cout << "The Surface Area of the cone: " << d2 << "cm²" << endl;
        }
};

int main()  //Main function
{
        char op;
        float s, d, a, b, c, h3, l, r, h, r2, h2;
        Cube C1;
        Sphere S1;
        Prism P1;
        Cylinder C2;
        Cone C3;
        cout << "1.Cube\n2.Sphere\n3.Prism\n4.Cylinder\n5.Cone\nEnter you choice: ";
        cin >> op;

        switch (op)
        {
                case '1':
                        s = C1.input();
                        C1.setter(s);
                        C1.getter();
                        C1.display(C1.getVolume(), C1.getSurfaceArea());
                        break;

                case '2':
                        d = S1.input();
                        S1.setter(d);
                        S1.getter();
                        S1.display(S1.getVolume(), S1.getSurfaceArea());
                        break;

                case '3':
                        cout << "Enter the side a of prism: ";
                        cin >> a;
                        cout << "Enter the side b of prism: ";
                        cin >> b;
                        cout << "Enter the side c of prism: ";
                        cin >> c;
                        cout << "Enter the height of prism: ";
                        cin >> h3;
                        cout << "Enter the length of prism: ";
                        cin >> l;
                        P1.setter(a, b, c, h3, l);
                        P1.getter();
                        P1.display(P1.getVolume(), P1.getSurfaceArea());
                        break;

                case '4':
                        cout << "Enter the Radius of cylinder: ";
                        cin >> r;
                        cout << "Enter the Height of cylinder: ";
                        cin >> h;
                        C2.setter(r, h);
                        C2.getter();
                        C2.display(C2.getVolume(), C2.getSurfaceArea());
                        break;

                case '5':
                        cout << "Enter the Radius of cone: ";
                        cin >> r2;
                        cout << "Enter the Radius of height: ";
                        cin >> h2;
                        C3.setter(r2, h2);
                        C3.getter();
                        C3.display(C3.getVolume(), C3.getSurfaceArea());
                        break;

                default:
                        cout << "Please enter a valid option 1-5 only!";
        }
}

Some of the screenshots of output are given below:

Cube

Cylinder