using System;

using System.Collections.Generic;

using System.Collections;

interface IVolumeCalculator         //iVolumeCalculator

{ 

    void computeVolume(); 

} 

interface IInputReader              //New interface for getInput (Interface Segregation)

{

    void readInput();

}  

public class Sphere : IVolumeCalculator,IInputReader

{ 

    double radius;

    public void readInput()

    {

        Console.WriteLine("Enter radius:");

        string input = Console.ReadLine();

        radius = double.Parse(input);   

    }

    public void computeVolume()

    { 

        double vol =(4 * Math.PI * radius * radius * radius)/3;

        Console.WriteLine("Volume of the sphere:"+vol);

    } 

} 

public class Pyramid : IVolumeCalculator,IInputReader 

{ 

    double radius,height;

    public void readInput()

    {

        Console.WriteLine("Enter radius and height:");

        string input1 = Console.ReadLine();

        string input2 = Console.ReadLine();

        radius =double.Parse(input1);

        height =double.Parse(input2); 

    }

    public void computeVolume()

    { 

        double vol = (radius * height)/3;

        Console.WriteLine("Volume of the Pyramid:"+vol);

    } 

} 

public class Cone : IVolumeCalculator,IInputReader 

{ 

    double radius,height;

    public void readInput()

    {

        Console.WriteLine("Enter radius and height:");

        string input1 = Console.ReadLine();

        string input2 = Console.ReadLine();

        radius = double.Parse(input1);  

        height =double.Parse(input2);

    }

    public void computeVolume()

    { 

        double vol = (Math.PI * radius * radius * height)/3; 

        Console.WriteLine("Volume of the cone:"+vol);

    } 

} 

public class Cuboid : IVolumeCalculator,IInputReader 

{ 

    double length,breadth,height;

    public void readInput()

    {

        Console.WriteLine("Enter length, breadth and height:");

        string input1 = Console.ReadLine();

        string input2 = Console.ReadLine();

        string input3 = Console.ReadLine();

        length = double.Parse(input1);

        breadth =double.Parse(input2);

        height =double.Parse(input3);

    }

    public void computeVolume()

    { 

        double vol = length * breadth * height; 

        Console.WriteLine("Volume of the cuboid:"+vol);

    } 

} 

public class AreaCalculatorApplication

{

    public static void Main() 

    { 

        Console.WriteLine("Enter\n1.Sphere\n2.Pyramid\n3.Cone\n4.Cuboid");

        string input = Console.ReadLine();

        Dictionary<string, Object> myDict = new Dictionary<string, Object>(); 

        myDict.Add("1", new Sphere()); 

        myDict.Add("2", new Pyramid());

        myDict.Add("3", new Cone());

        myDict.Add("4", new Cuboid());

        bool isValid =true;

        while(char.IsDigit(input[0])== false || float.Parse(input)>4)

        {

            Console.WriteLine("Enter a valid choice");

            input=Console.ReadLine();

            isValid = false;

        }

        List<QuestionAnswer> qaList = new List<QuestionAnswer>(valuesDict.Keys.Count);

        isValid =true;

        if(isValid==true)

        {

        int choice =int.Parse(input);

             foreach (KeyValuePair<string, Object> result in myDict)

            {

                 if(result.Key == input)

                 {  

                     //Object obj = result.Value; 

                     qaList.add(new QuestionAnswer {Question = item.Key, Answer = item.Value});

                     Sphere sphere = new Sphere();

                     sphere.readInput();

                     sphere.computeVolume();

                    // Console.WriteLine("Successful"+result.Value);

                 }

                //Console.WriteLine("Product Name: {0}, Price: {1}", result.Key, result.Value);

            }

        switch (choice){                                    // for more number of cases

            case 1: 

                Sphere sphere = new Sphere();

                sphere.readInput();

                sphere.computeVolume();

                break;

            case 2:     

                Pyramid pyramid = new Pyramid();

                pyramid.readInput();

                pyramid.computeVolume();

                break;

            case 3:

                Cone cone = new Cone();

                cone.readInput();

                cone.computeVolume();

                break;

            case 4:

                Cuboid cuboid = new Cuboid();

                cuboid.readInput();

                cuboid.computeVolume();

                break;

            default:

                Console.WriteLine("Invalid Choice");

                break;

        }

}

}

}