Question

In visual C#

enter a string: "Mississippi".

Results come out as" there are 11 letters with 4 vowels and 7 consonants".

Create the following methods to complete this application:

Methods

int countLetters(string userInput)

• Create integer variable to store the number of letters
• Use foreach to cycle through each character in the string userInput
  • Check to see if the character is a letter (IsLetter). If it is, count as a letter
• The method will return a numeric value which is the count of letters

int countVowels(string userInput)

• Create integer variable to store the number of vowels
• Use foreach to cycle through each character in the string userInput
  • Use if else if decision structure to check to:
    • If the character is NOT a letter (IsLetter), then you can continue (skip past the else if)
    • Else, if the letter is an upper case letter (IsUpper) then convert it to lower case (ToLower)
  • Use a switch decision structure to increase the variable created to count for the cases: a, e, i, o, u
• The method will return a numeric value which is the count of vowels

int countConsonants(string userInput)

• Call countVowels and store the result in a variable
• Call countLetters and store the result in a variable
• Subtract the number of vowels from the number of letters and store the result in a variable
• The method will return a numeric value which is the count of consonants

Events

btnAnalyze_Click

• Display results in lblResults after calling countLetters, countVowels, and countConsonants

HINTS:

• Tutorial 8-1 p. 477-480 shows an example application that uses methods to determine whether a password has the appropriate characters based on the given criteria.

• Use a "break;" clause to skip a section of an decision statement.

• Reminder: Methods do not go in an event. Place the methods in the form namespace, but not in any event.

Answer 1

take 4 controls on the form & set following properties

1. Label, name = lblResults, text= Results:
2. Label, name = label2, text= Enter a string:
3. TextBox, name = txtInput
4. Button, name = btnAnalyze, text= Analyze

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace project1
{
    public partial class frmCountVowels : Form
    {
        public frmCountVowels()
        {
            InitializeComponent();
        }

        private void btnAnalyze_Click(object sender, EventArgs e)
        {
            int l = 0, v = 0, c = 0;
            l = countLetters(txtInput.Text); //get Letter count
            v = countVowels(txtInput.Text); //get Vowel count
            c = countConsonants(txtInput.Text); //get Consonants count
            lblResults.Text = "There are " + l + " letters with " + v + " vowels and " + c + " consonants";
        }

        int countLetters(string userInput)
        {
            int lettersCount = 0;
            foreach (char ch in userInput) //get each character from the userInput string
            {
                if (Char.IsLetter(ch)) //if character is a letter
                {
                    lettersCount++;   //increase count
                }
            }
            return lettersCount;
        }

        int countVowels(string userInput)
        {
            int a = 0, e = 0, i = 0, o = 0, u = 0;
            int vCount = 0;
            char ch;

            foreach (char letter in userInput) //get each character from the userInput string
            {
                ch = letter;
                if (!Char.IsLetter(ch)) //if character is not letter
                {
                    continue;   //skip to next character
                }
                else if (ch == Char.ToUpper(ch))   //if character is uppercase
                {
                    ch = Char.ToLower(ch);      //convert it to lowercase
                }

                switch (ch)
                {
                    case 'a':
                        a++;
                        vCount++;
                        break;
                    case 'e':
                        e++;
                        vCount++;
                        break;
                    case 'i':
                        i++;
                        vCount++;
                        break;
                    case 'o':
                        o++;
                        vCount++;
                        break;
                    case 'u':
                        u++;
                        vCount++;
                        break;
                }
            }
            return vCount;
        }

        int countConsonants(string userInput)
        {
            int consonantsCount = 0, vowels = 0, letters = 0;
            vowels = countVowels(userInput);    //get Vowel count
            letters = countLetters(userInput);  //get Letter count

            consonantsCount = letters - vowels;

            return consonantsCount;
        }
    }
}

output