using System;

using System.IO;

using System.Xml;

​

// i appologize for putting all the classes into this one fiddle, i am new to this website and i could not seem to be able to apply a common namespace to other fiddles to allow for class import

​

public interface ICodeTest

{

    void printer(int n);

    void printerUpdated(int n, int p, int q);

    void printFibonacciSequence(int start, int length);

    void validateXML(string xmlinput);

}

​

public class CodeTestService : ICodeTest

{

​

    public void printer(int n)

    {

        // variable to container the value from the ternary operator

        string response = "";

        for(int i = 1; i < n; i++)

        {

            // if i matches any of the divisible conditions it will return HelloWorld, Hello or World if not the variable will remain empty

            response = (i % 5 == 0 && i % 7 == 0) ? " HelloWorld" : (i % 5 == 0) ? " Hello" : (i % 7 == 0) ? " World" :  "";

            Console.WriteLine(i + response);

        }

    }

​

        public void printerUpdated(int n, int p, int q)

        {

            // variable to container the value from the ternary operator

            string response = "";

​

            for(int i = 1; i < n; i++)

            {

                // if i matches any of the divisible conditions it will return HelloWorld, Hello or World if not the variable will remain empty

                response = (i % p == 0 && i % q == 0) ? " HelloWorld" : (i % p == 0) ? " Hello" : (i % q == 0) ? " World" :  "";

​

                Console.WriteLine(i + response);

            }

        }

    public void printFibonacciSequence(int start, int length)

    {       

        // setting loop to iterate for the amount of the length parameter that is passed in

        for(int i = 0; i < length; i++)

        {                                               

            // logging current fibonacci sequence state

            Console.WriteLine(fibonacci(start));                                

            // incrementing the starting sequence variable to allow for the logging of the next sequence

            start += 1;

        }

​

    }

    int fibonacci(int num)

    {

        // initial variables to hold the state of the sequence

        int prevNum = 0;

        int currentNum = 1;

        int sum;

        for(int i = 1; i < num; i++)

        {

            // add last two previous sequence states

            sum = prevNum + currentNum;

            // set previous sequence state to current sequence state

            prevNum = currentNum;

            // setting current state to the sum of the previuos two state sequences

            currentNum = sum;

        }

        return currentNum;

    }       

    public void validateXML(string xmlinput) {

        using (XmlReader xr = XmlReader.Create(

            new StringReader(xmlinput))) {

            try {

                while (xr.Read()) { }

                Console.WriteLine("XML is well formed");

            } catch (Exception ex) {

                Console.WriteLine("Fail: " + ex.Message);

            }

        }

    }   

}

​

​

public class Program

{

    public static void Main(string[] args) 

    {

        CodeTestService testService = new CodeTestService();

        Console.WriteLine("Hello there! The functions that are available for use today are \n\n divisibleHelloWorld \n divisibleHelloWorldUpdated \n printFibonacciSequence \n validateXML \n\n so which one would you like to use today?");

        string functionResponse = Console.ReadLine();

        string parameterResponse = "";

        switch(functionResponse)

        {

            case "divisibleHelloWorld":

                Console.WriteLine("and what int value would you like to pass as a parameter?");

                parameterResponse = Console.ReadLine();

                int n = Int32.Parse(parameterResponse);

                testService.printer(n);

            break;

            case "divisibleHelloWorldUpdated":

                Console.WriteLine("this function needs 3 integer parameters, please enter the first integer parameter");

                parameterResponse = Console.ReadLine();

                int n2 = Int32.Parse(parameterResponse);

                Console.WriteLine("Thank you! please enter the second integer parameter");

                parameterResponse = Console.ReadLine();             

                int p = Int32.Parse(parameterResponse);

                Console.WriteLine("Thank you! please enter the third integer parameter");

                parameterResponse = Console.ReadLine();             

                int q = Int32.Parse(parameterResponse);

                testService.printerUpdated(n2, p, q);

            break;              

            case "printFibonacciSequence":

                Console.WriteLine("this function needs 2 integer parameters, please enter the first integer parameter");

                parameterResponse = Console.ReadLine();

                int start = Int32.Parse(parameterResponse);

                Console.WriteLine("Thank you! please enter the second integer parameter");

                parameterResponse = Console.ReadLine();             

                int length = Int32.Parse(parameterResponse);

                testService.printFibonacciSequence(start, length);

            break;                              

            case "validateXML":

                Console.WriteLine("this function needs 1 string parameter this should be well formed XML, please enter the parameter");

                parameterResponse = Console.ReadLine();

                testService.validateXML(parameterResponse);

            break;                                              

            default:

                Console.WriteLine("hmm that does not seem to be an available function");

            break;

        }

    }

}

​

​