CPE263 Week 6

Week 6

In C#, an array is a collection of items stored at contiguous memory locations. It can hold multiple values of the same type.

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Array

An array in programming is a data structure that stores a fixed-size sequence of elements of the same type.

Project 1

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 WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            int odd = 0, even = 0;
            // Creating an array with initial values
            int[] arr = { 1, 2, 5, 7, 8, 11, 13, 25, 28, 99, 22, 33, 75 };
            foreach (int i in arr)
            {
                if (i % 2 == 0)
                    even++;
                else
                    odd++;
            }
            string str = "จำนวนคู่ = " + even + Environment.NewLine +
                          "จำนวนคี่ = " + odd;
            MessageBox.Show(str);
        }
    }
}

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Project 2

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 WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btn5_3_Click(object sender, EventArgs e)
        {
            string strIn = "";
            string strOut = "";
            int idx = 0;
            strIn = txtIn.Text;  // Removed the '+' sign
            strOut = "ข้อความ String = " + strIn + "\n";

            foreach (char sTemp in strIn)
            {
                strOut += "strIn[" + idx + "] = " + sTemp + "\n";
                idx++;
            }
            MessageBox.Show(strOut, "อาร์เรย์ strIn");
        }
        private void runAEIOU_Click(object sender, EventArgs e)
        {
            string strIn = "";
            int A = 0, E = 0, I = 0, O = 0, U = 0;
            strIn = txtIn.Text.ToUpper(); // Convert to uppercase for easier comparison

            foreach (char sTemp in strIn)
            {
                switch (sTemp)
                {
                    case 'A': A++; break;
                    case 'E': E++; break;
                    case 'I': I++; break;
                    case 'O': O++; break;
                    case 'U': U++; break;
                }
            }
            string result = $"A: {A}, E: {E}, I: {I}, O: {O}, U: {U}";
            MessageBox.Show(result, "Vowel Count");
        }
    }
}

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Project 3

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 WindowsFormsApp4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btnASCII_Click(object sender, EventArgs e)
        {
            int data = Convert.ToInt16(txtIN.Text);
            char asc = (char) data;
            MessageBox.Show(asc.ToString());

        }
        private void btnTEXT_Click(object sender, EventArgs e)
        {
            char data = Convert.ToChar(txtIN.Text);
            int asc = (int)data;
            MessageBox.Show(asc.ToString());
        }
    }
}