using System;

public class Program

{static decimal pi = 3.14159M;

​

static private decimal sph(decimal a)

{decimal s3 = a * a * a;

return 4 / 3M * pi * s3;}

​

static private decimal cyl(decimal b, decimal c)

{decimal r2 = b * b;

return pi * r2 * c;}

​

static private decimal cone(decimal d, decimal e)

{decimal t2 = d * d;

return 1 / 3M * pi * t2 * e;}

​

public static void Main()

{ start:

Console.Clear();

Console.WriteLine("Would you like to calculate the volume of a Sphere (S for sphere), Cylinder (CY for Cylinder) or a Cone (CO for Cone)?");

string choice = Console.ReadLine();

if (choice == "S" && choice == "s")

{

sphe:

Console.Clear();

Console.WriteLine("Enter a Postive number");

string inp1 = Console.ReadLine();

decimal v1;

if (decimal.TryParse(inp1, out v1))

if (v1 <= 0)

{

Console.WriteLine("You didn't enter a number higher then 0");

Console.WriteLine("Press enter to input another number");

Console.ReadLine();

goto sphe;

}

else if (v1 > 0)

{

decimal sphS = (sph(v1));

Console.WriteLine("The volume of the sphere is " + sphS.ToString("##.##"));

​

}

}

if (choice == "CY" && choice == "cy" && choice == "Cy" && choice == "cY")

{

cylin:

Console.Clear();

Console.WriteLine("Enter 2 postive numbers");

string inp2 = Console.ReadLine();

string inp3 = Console.ReadLine();

decimal v2;

decimal v3;

if (decimal.TryParse(inp2, out v2))

if (decimal.TryParse(inp3, out v3))

if (v2 <= 0 || v3 <= 0)

{

Console.WriteLine("You didn't enter a number higher then 0");

Console.WriteLine("Press enter to input another number");

Console.ReadLine();

goto cylin;

}

else if (v2 > 0 || v3 > 0)

{

decimal cylS = (cyl(v2, v3));

Console.WriteLine("The volume of the Cylinder is " + cylS.ToString("##.##"));

}

}

if (choice == "CO" && choice == "co" && choice == "cO" && choice == "Co")

{

con:

Console.Clear();

Console.WriteLine("Please Enter 2 Postive Values");

string inp4 = Console.ReadLine();

string inp5 = Console.ReadLine();

decimal v4;

decimal v5;

if (decimal.TryParse(inp4, out v4))

if (decimal.TryParse(inp5, out v5))

if (v4 <= 0 || v5 <= 0)

{

Console.WriteLine("You didn't enter a number higher then 0");

Console.WriteLine("Press enter to input another number");

Console.ReadLine();

goto con;

}

else if (v4 > 0 || v5 > 0)

{

decimal coneS = (cone(v4, v5));

Console.WriteLine("The volume of the cone is " + coneS.ToString("##.##"));

}

}

{

Console.WriteLine("Would you like to run the program again? y/n");

string choice1 = Console.ReadLine();

if (choice1 == "y" || choice1 == "Y")

goto start;

        }

    }

}