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

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            textBox1.Clear();
            textBox2.Clear();
            label4.Text = "";

        }

        private void button1_Click(object sender, EventArgs e)
        {
            if(string.IsNullOrEmpty(textBox1.Text) || string.IsNullOrEmpty(textBox2.Text))
            {
                MessageBox.Show("Angka 1 dan Angka 2 harus diisi terlebih dahulu!");
            }
            else
            {
                int a, b, c;
                a = int.Parse(this.textBox1.Text);
                b = int.Parse(this.textBox2.Text);
                c = a + b;
                string d = string.Concat(this.textBox1.Text, " + ");
                d = string.Concat(d, this.textBox2.Text);
                this.label5.Text = d;
                this.label4.Text = c.ToString();
            }

        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBox1.Text) || string.IsNullOrEmpty(textBox2.Text))
            {
                MessageBox.Show("Angka 1 dan Angka 2 harus diisi terlebih dahulu!");
            }
            else
            {
                int a, b, c;
                a = int.Parse(this.textBox1.Text);
                b = int.Parse(this.textBox2.Text);
                c = a / b;
                string d = string.Concat(this.textBox1.Text, " / ");
                d = string.Concat(d, this.textBox2.Text);
                this.label5.Text = d;
                this.label4.Text = c.ToString();
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            textBox1.Clear();
            textBox2.Clear();
            label4.Text = "";
            label5.Text = "";
        }

        private void label4_Click(object sender, EventArgs e)
        {

        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBox1.Text) || string.IsNullOrEmpty(textBox2.Text))
            {
                MessageBox.Show("Angka 1 dan Angka 2 harus diisi terlebih dahulu!");
            }
            else
            {
                int a, b, c;
                a = int.Parse(this.textBox1.Text);
                b = int.Parse(this.textBox2.Text);
                c = a * b;
                string d = string.Concat(this.textBox1.Text, " x ");
                d = string.Concat(d, this.textBox2.Text);
                this.label5.Text = d;
                this.label4.Text = c.ToString();
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBox1.Text) || string.IsNullOrEmpty(textBox2.Text))
            {
                MessageBox.Show("Angka 1 dan Angka 2 harus diisi terlebih dahulu!");
            }
            else
            {
                int a, b, c;
                a = int.Parse(this.textBox1.Text);
                b = int.Parse(this.textBox2.Text);
                c = a - b;
                string d = string.Concat(this.textBox1.Text, " - ");
                d = string.Concat(d, this.textBox2.Text);
                this.label5.Text = d;
                this.label4.Text = c.ToString();
            }
        }

        private void label5_Click(object sender, EventArgs e)
        {

        }
    }
}