LV6 - Zad1

/* 1. Napravite aplikaciju znanstveni kalkulator koja će imati funkcionalnost
znanstvenog kalkulatora, odnosno implementirati osnovne (+,-,*,/) i barem 5
naprednih (sin, cos, log, sqrt...) operacija.*/

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 LV6
{
    public partial class form_kalkulator : Form
    {
        double PrviBr;
        string Operacija;

        public form_kalkulator()
        {
            InitializeComponent();
        }

        private void button_br1_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "1";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "1";
            }
        }

        private void button_br2_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "2";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "2";
            }
        }

        private void button_br3_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "3";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "3";
            }
        }

        private void button_br4_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "4";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "4";
            }
        }

        private void button_br5_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "5";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "5";
            }
        }

        private void button_br6_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "6";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "6";
            }
        }

        private void button_br7_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "7";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "7";
            }
        }

        private void button_br8_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "8";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "8";
            }
        }

        private void button_br9_Click(object sender, EventArgs e)
        {
            if (textBox_display.Text == "0" && textBox_display.Text != null)
            {
                textBox_display.Text = "9";
            }
            else
            {
                textBox_display.Text = textBox_display.Text + "9";
            }
        }

        private void button_br0_Click(object sender, EventArgs e)
        {
            textBox_display.Text = textBox_display.Text + "0";
        }

        private void button_tocka_Click(object sender, EventArgs e)
        {
            textBox_display.Text = textBox_display.Text + ".";
        }

        private void button_off_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void button_C_Click(object sender, EventArgs e)
        {
            textBox_display.Text = "0";
        }

        private void button_plus_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            textBox_display.Text = "0";
            Operacija = "+";
        }

        private void button_minus_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            textBox_display.Text = "0";
            Operacija = "-";
        }

        private void button_umnozak_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            textBox_display.Text = "0";
            Operacija = "*";
        }

        private void button_kvocijent_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            textBox_display.Text = "0";
            Operacija = "/";
        }

        private void button_jednako_Click(object sender, EventArgs e)
        {
            double DrugiBr;
            double Rez;

            DrugiBr = Convert.ToDouble(textBox_display.Text);

            if (Operacija == "+")
            {
                Rez = (PrviBr + DrugiBr);
                textBox_display.Text = Convert.ToString(Rez);
                PrviBr = Rez;
            }
            if (Operacija == "-")
            {
                Rez = (PrviBr - DrugiBr);
                textBox_display.Text = Convert.ToString(Rez);
                PrviBr = Rez;
            }
            if (Operacija == "*")
            {
                Rez = (PrviBr * DrugiBr);
                textBox_display.Text = Convert.ToString(Rez);
                PrviBr = Rez;
            }
            if (Operacija == "/")
            {
                if (DrugiBr == 0)
                {
                    textBox_display.Text = "Nemoguce dijeliti s nulom";

                }
                else
                {
                    Rez = (PrviBr / DrugiBr);
                    textBox_display.Text = Convert.ToString(Rez);
                    PrviBr = Rez;
                }
            }
        }

        private void button_korijen_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            double Rez = 0;
            Rez = Math.Sqrt(PrviBr);
            textBox_display.Text = Rez.ToString();
        }

        private void button_log_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            double Rez;
            Rez = Math.Log(PrviBr);
            textBox_display.Text = Rez.ToString();
        }

        private void button_sin_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            double Rez = 0;
            Rez = Math.Sin(PrviBr);
            textBox_display.Text = Rez.ToString();
        }

        private void button_cos_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            double Rez = 0;
            Rez = Math.Cos(PrviBr);
            textBox_display.Text = Rez.ToString();
        }

        private void button_tan_Click(object sender, EventArgs e)
        {
            PrviBr = Convert.ToDouble(textBox_display.Text);
            double Rez = 0;
            Rez = Math.Tan(PrviBr);
            textBox_display.Text = Rez.ToString();
        }
    }
}