using System;

public class Program

{

    public static void Main()

    {

        VowelConsonantIdentifier identifier = new VowelConsonantIdentifier();

        string choice = "Y";

        while(choice == "Y")

        {

            Console.WriteLine("\nInput a string: ");

            identifier.Input = Console.ReadLine();

            Console.WriteLine("\nEnter 'Y' to do it again. Enter any other key to exit");

            choice = Console.ReadLine();

        }

    }

}

​

class VowelConsonantIdentifier

{

    //properties that are encapsulated

    private string _input;

    private int upperConsonant;

    private int lowerConsonant;

    private int upperVowel;

    private int lowerVowel;

    private int totalVowel;

    //input can be modified from outside the class using accessors

    public string Input

    {

        get { return _input; }

        set { _input = value; CountVowelsConsonants(); }

        //upon changing the input string, count the vowels and consonants

    }

    public VowelConsonantIdentifier()

    {

    }

    private void CountVowelsConsonants()

    {

        //clear the values first

        upperConsonant = 0;

        lowerConsonant = 0;

        upperVowel = 0;

        lowerVowel = 0;

        totalVowel = 0;

        for(int i = 0; i < _input.Length; i++)

        {

            char letter = _input[i];

            //make sure letter is actually a letter

            if(Char.IsLetter(letter))

            {   

                //first check if uppercase or lowercase

                if(Char.IsLower(letter))

                {

                    if(letter == 'a' || letter == 'e' || letter == 'i' || letter == 'o' || letter == 'u') lowerVowel ++;

                    else lowerConsonant++;

                }

                else

                {

                    if (letter == 'A' || letter == 'E' || letter == 'I' || letter == 'O' || letter == 'U') upperVowel ++;

                    else upperConsonant++;

                }

            }

        }

        //get total vowel

        totalVowel = lowerVowel + upperVowel;

        //print results

        Console.WriteLine("Uppercase Consonant: " + upperConsonant);

        Console.WriteLine("Lowercase Consonant: " + lowerConsonant);

        Console.WriteLine("Uppercase Vowel: " + upperVowel);

        Console.WriteLine("Lowercase Vowel: " + lowerVowel);

        Console.WriteLine("Number of vowels: " + totalVowel);

    }

}