Script windows form Pemesanan Tiket Kereta

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            cmbkereta.Items.Add("Mutiara Timur");
            cmbkereta.Items.Add("Purwojaya");
            cmbkereta.Items.Add("Logawa");
        }

        private void cmdproses_Click(object sender, EventArgs e)
        {
            /*button proses*/
            int harga;

            double diskon, total;

            if (cmbkereta.SelectedItem.ToString() == "Mutiara Timur")
            {
                harga = 125000;
            }
            else if (cmbkereta.SelectedItem.ToString() == "purwojaya")
            {
                harga = 97500;
            }
            else
            {
                harga = 45000;
            }

            /*radio button menggunakan .Checked*/
            if (optkaryawan.Checked == true)
            {
                diskon = 0.1;
            }
            else
            {
                diskon = 0;
            }



            /*rumus*/
            total = (harga * double.Parse(txtjumlah.Text)) - (harga * double.Parse(txtjumlah.Text) * diskon);
            MessageBox.Show("Total Bayar = " + total.ToString());

            /*Checkbox*/
            if (checkBox1.Checked == true)
            {
                total = total + 3500;
            }
            else if (checkBox2.Checked == true)
            {
                total = total + 6000;
            }
            else
            {
                total = total + 12500;
            }

            MessageBox.Show("Total = " + total.ToString());

        }
    }
}

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Script C# penjumlahan matriks

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication14
{
    class Program
    {
        static void Main(string[] args)
        {
            //DEKLARASI VARIABLE DAN ARRAY
            int a, b, i, j;
            int baris_a, kolom_a, baris_b, kolom_b;
            int[,] matrik_a;
            int[,] matrik_b;
            byte x;
            //INPUT JUMLAH BARIS DAN KOLOM
            Console.WriteLine();
            Console.Write("<-PROGRAM PENJUMLAHAN MATRIKS->");
            Console.WriteLine();
            Console.WriteLine();
            x = 1;
            while (x >= 1)
            {
                Console.Write("Jumlah Baris Matrik A : ");
                baris_a = int.Parse(Console.ReadLine());
                Console.Write("Jumlah Kolom Matrik A : ");
                kolom_a = int.Parse(Console.ReadLine());
                Console.Write("Jumlah Baris Matrik B : ");
                baris_b = int.Parse(Console.ReadLine());
                Console.Write("Jumlah Kolom Matrik B : ");
                kolom_b = int.Parse(Console.ReadLine());
                Console.WriteLine();
                if (baris_a == baris_b || kolom_a == kolom_b)
                {

                    //ISI ARRAY MATRIKS

                    matrik_a = new int[baris_a, kolom_a];
                    matrik_b = new int[baris_b, kolom_b];

                    Console.WriteLine(" Nilai Matriks A : ");
                    Console.WriteLine("--------------- ");
                    Console.WriteLine();
                    Console.WriteLine();
                    for (a = 0; a < baris_a; a++)
                    {
                        for (b = 0; b < kolom_a; b++)
                        {
                            Console.Write(" Matriks A [" +
                            (a + 1) + " , " + (b + 1) + " ] = ");

                            matrik_a[a, b] = int.Parse(Console.ReadLine());
                        }
                    }

                    Console.WriteLine();
                    Console.WriteLine(" Nilai Matriks B : ");
                    Console.WriteLine("--------------- ");
                    Console.WriteLine();
                    Console.WriteLine();
                    for (i = 0; i < baris_b; i++)
                    {
                        for (j = 0; j < kolom_b; j++)
                        {
                            Console.Write(" Matriks B [" + (i + 1) + " , " + (j + 1) + " ] = ");
                            matrik_b[i, j] = int.Parse(Console.ReadLine());
                        }
                    }


                    //HASIL JUMLAH MATRIK A & B
                    Console.WriteLine();
                    Console.WriteLine();
                    Console.WriteLine(" HASIL PENJUMLAHAN MATRIKS A & B =");
                    Console.WriteLine("------------------------------------ ");
                    Console.WriteLine();
                    for (a = 0; a < baris_a; a++)
                    {
                        for (b = 0; b < kolom_a; b++)
                        {
                            Console.Write(matrik_a[a, b] + matrik_b[a, b]
                            + " ");
                        }
                        Console.WriteLine();
                    }

                    {

                        Console.ReadKey();
                        break;
                    }

                }
                Console.ReadLine();
            }

        }


    }
}

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