[Fork] [Fork] methods lab | C# Online Compiler

[Fork] [Fork] methods lab by AntonyKarasinski

using System;

public class Program
{
	static private ulong fact(ulong a)
	{
		ulong factorial = 1;
		ulong i = 1;
		do
		{
			factorial = factorial * i;
			i++;
		}
		while (i <= a);
		return factorial;
	}

	static private double DectoPer(double a)
	{
		return a * 100;
	}

	static private double PertoDec(double a)
	{
		return a / 100;
	}

	static private ulong nPr(ulong n, ulong r)
	{
		ulong nfact = fact(n);
		ulong nrfact = fact(n - r);
		return nfact / nrfact;
	}

	static private ulong nCr(ulong n, ulong r)
	{
		ulong nfact = fact(n);
		ulong nrfact = fact(n - r);
		ulong rfact = fact(r);
		ulong rnrfact = rfact * nrfact;
		return nfact / rnrfact;
	}

	public static void Main()
	{
		string restart = "  ";
		while (restart != "q" && restart != "Q")
		{
			start:
			Console.WriteLine("Please choose which option you would like to calculate");
			Console.WriteLine("Press 1 for factorial, 2 to convert from decimal to percent, 3 to convert from percent to decimal, 4 to calculate the permutation of numbers from a set, and 5 to calculate the combination of numbers from a set.");
			string choice = Console.ReadLine();
			if (choice == "1")
			{
				fact:
					Console.Clear();
				Console.WriteLine("What would you like to calculate the factorial of?");
				string num = Console.ReadLine();
				ulong number;
				if (ulong.TryParse(num, out number))
				{
					ulong final = fact(number);
					Console.WriteLine("The factorial of " + number + " is " + final + "");
				}
				else
				{
					Console.WriteLine();
					Console.WriteLine("Your value that you entered was not a ulong, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto fact;
				}
			}
			else if (choice == "2")
			{
				dectoper:
					Console.Clear();
				Console.WriteLine("What number would you like to convert from decimal to percent?");
				string num = Console.ReadLine();
				double number;
				if (double.TryParse(num, out number))
				{
					double final = DectoPer(number);
					Console.WriteLine(number + " as a percentage is " + final + "%");
				}
				else
				{
					Console.WriteLine();
					Console.WriteLine("Your value that you entered was not a double, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto dectoper;
				}
			}
			else if (choice == "3")
			{
				pertodec:
					Console.Clear();
				Console.WriteLine("What number would you like to convert from percent to decimal?");
				string num = Console.ReadLine();
				double number;
				if (double.TryParse(num, out number))
				{
					double final = PertoDec(number);
					Console.WriteLine(number + "% as a decimal is " + final + "");
				}
				else
				{
					Console.WriteLine();
					Console.WriteLine("Your value that you entered was not a double, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto pertodec;
				}
			}
			else if (choice == "4")
			{
				perm:
					Console.Clear();
				Console.WriteLine("How many objects are in the set?");
				string num = Console.ReadLine();
				ulong number;
				if (ulong.TryParse(num, out number))
				{
					Console.Write("");
				}
				else
				{
					Console.WriteLine();
					Console.WriteLine("Your value that you entered was not a double, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto perm;
				}
				Console.WriteLine("");
				Console.WriteLine("How many objects are you selecting from the set?");
				string num2 = Console.ReadLine();
				ulong number2;
				if (ulong.TryParse(num2, out number2))
				{
					Console.Write("");
				}
				else
				{
					Console.WriteLine();
					Console.WriteLine("Your value that you entered was not a double, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto perm;
				}
					Console.WriteLine("");
					double final = nPr(number, number2);
					Console.WriteLine("Your permutation is " + final + "");
			}
			else if (choice == "5")
			{
				perm:
					Console.Clear();
				Console.WriteLine("How many objects are in the set?");
				string num = Console.ReadLine();
				ulong number;
				if (ulong.TryParse(num, out number))
				{
					Console.Write("");
				}
				else
				{
					Console.WriteLine();
					Console.WriteLine("Your value that you entered was not a double, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto perm;
				}
				Console.WriteLine("");
				Console.WriteLine("How many objects are you selecting from the set?");
				string num2 = Console.ReadLine();
				ulong number2;
				if (ulong.TryParse(num2, out number2))
				{
					Console.Write("");
				}
				else
				{
					Console.WriteLine();
					Console.WriteLine("Your value that you entered was not a double, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto perm;
				}
					Console.WriteLine("");
					double final = nCr(number, number2);
					Console.WriteLine("Your combination is " + final + "");
			}
			else
			{ 
				Console.WriteLine();
					Console.WriteLine("Your choice was not valid, please try again.");
					Console.WriteLine("Press any key to try again.");
					string cont = Console.ReadLine();
					goto start;
			}

			Console.WriteLine();
			Console.WriteLine("Press 'q' to quit or anything else to restart.");
			restart = Console.ReadLine();
		}
	}
}

​x
 
using System;
​
public class Program
{
    static private ulong fact(ulong a)
    {
        ulong factorial = 1;
        ulong i = 1;
        do
        {
            factorial = factorial * i;
            i++;
        }
        while (i <= a);
        return factorial;
    }
​
    static private double DectoPer(double a)
    {
        return a * 100;
    }
​
    static private double PertoDec(double a)
    {
        return a / 100;
    }
​
    static private ulong nPr(ulong n, ulong r)
    {
        ulong nfact = fact(n);
        ulong nrfact = fact(n - r);
        return nfact / nrfact;
    }
​
    static private ulong nCr(ulong n, ulong r)
    {
        ulong nfact = fact(n);
        ulong nrfact = fact(n - r);
        ulong rfact = fact(r);
        ulong rnrfact = rfact * nrfact;
        return nfact / rnrfact;
    }
​
    public static void Main()
    {
        string restart = "  ";
        while (restart != "q" && restart != "Q")
        {
            start:
            Console.WriteLine("Please choose which option you would like to calculate");
            Console.WriteLine("Press 1 for factorial, 2 to convert from decimal to percent, 3 to convert from percent to decimal, 4 to calculate the permutation of numbers from a set, and 5 to calculate the combination of numbers from a set.");
            string choice = Console.ReadLine();
            if (choice == "1")
            {
                fact:
                    Console.Clear();
                Console.WriteLine("What would you like to calculate the factorial of?");
                string num = Console.ReadLine();
                ulong number;
                if (ulong.TryParse(num, out number))
                {
                    ulong final = fact(number);
                    Console.WriteLine("The factorial of " + number + " is " + final + "");
                }
                else
                {
                    Console.WriteLine();
                    Console.WriteLine("Your value that you entered was not a ulong, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto fact;
                }
            }
            else if (choice == "2")
            {
                dectoper:
                    Console.Clear();
                Console.WriteLine("What number would you like to convert from decimal to percent?");
                string num = Console.ReadLine();
                double number;
                if (double.TryParse(num, out number))
                {
                    double final = DectoPer(number);
                    Console.WriteLine(number + " as a percentage is " + final + "%");
                }
                else
                {
                    Console.WriteLine();
                    Console.WriteLine("Your value that you entered was not a double, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto dectoper;
                }
            }
            else if (choice == "3")
            {
                pertodec:
                    Console.Clear();
                Console.WriteLine("What number would you like to convert from percent to decimal?");
                string num = Console.ReadLine();
                double number;
                if (double.TryParse(num, out number))
                {
                    double final = PertoDec(number);
                    Console.WriteLine(number + "% as a decimal is " + final + "");
                }
                else
                {
                    Console.WriteLine();
                    Console.WriteLine("Your value that you entered was not a double, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto pertodec;
                }
            }
            else if (choice == "4")
            {
                perm:
                    Console.Clear();
                Console.WriteLine("How many objects are in the set?");
                string num = Console.ReadLine();
                ulong number;
                if (ulong.TryParse(num, out number))
                {
                    Console.Write("");
                }
                else
                {
                    Console.WriteLine();
                    Console.WriteLine("Your value that you entered was not a double, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto perm;
                }
                Console.WriteLine("");
                Console.WriteLine("How many objects are you selecting from the set?");
                string num2 = Console.ReadLine();
                ulong number2;
                if (ulong.TryParse(num2, out number2))
                {
                    Console.Write("");
                }
                else
                {
                    Console.WriteLine();
                    Console.WriteLine("Your value that you entered was not a double, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto perm;
                }
                    Console.WriteLine("");
                    double final = nPr(number, number2);
                    Console.WriteLine("Your permutation is " + final + "");
            }
            else if (choice == "5")
            {
                perm:
                    Console.Clear();
                Console.WriteLine("How many objects are in the set?");
                string num = Console.ReadLine();
                ulong number;
                if (ulong.TryParse(num, out number))
                {
                    Console.Write("");
                }
                else
                {
                    Console.WriteLine();
                    Console.WriteLine("Your value that you entered was not a double, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto perm;
                }
                Console.WriteLine("");
                Console.WriteLine("How many objects are you selecting from the set?");
                string num2 = Console.ReadLine();
                ulong number2;
                if (ulong.TryParse(num2, out number2))
                {
                    Console.Write("");
                }
                else
                {
                    Console.WriteLine();
                    Console.WriteLine("Your value that you entered was not a double, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto perm;
                }
                    Console.WriteLine("");
                    double final = nCr(number, number2);
                    Console.WriteLine("Your combination is " + final + "");
            }
            else
            { 
                Console.WriteLine();
                    Console.WriteLine("Your choice was not valid, please try again.");
                    Console.WriteLine("Press any key to try again.");
                    string cont = Console.ReadLine();
                    goto start;
            }
​
            Console.WriteLine();
            Console.WriteLine("Press 'q' to quit or anything else to restart.");
            restart = Console.ReadLine();
        }
    }
}

Hello World

Last Run:	3:33:58 am
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