Keskustelu: Koodit: C#: Todella sekava laskin

<Window x:Class="calculator.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:calculator"
        mc:Ignorable="d"
        Title="Laskin" Height="319" Width="346">
    <Grid HorizontalAlignment="Left" Width="346" Background="#FFC9C9C9" Margin="0,0,-8,0">
        <TextBox x:Name="calc_Table" HorizontalAlignment="Left" Height="25" Margin="40,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="255" FontFamily="Arial" FontSize="18" TextAlignment="Right" Text="0" IsReadOnly="True"/>
        <Button x:Name="btn_3" Content="3" HorizontalAlignment="Left" Margin="170,175,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_2" Content="2" HorizontalAlignment="Left" Margin="105,175,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick" RenderTransformOrigin="-0.4,-1.925"/>
        <Button x:Name="btn_1" Content="1" HorizontalAlignment="Left" Margin="40,175,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_6" Content="6" HorizontalAlignment="Left" Margin="170,130,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_5" Content="5" HorizontalAlignment="Left" Margin="105,130,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" RenderTransformOrigin="-0.45,-0.625" Click="OnClick"/>
        <Button x:Name="btn_4" Content="4" HorizontalAlignment="Left" Margin="40,130,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_9" Content="9" HorizontalAlignment="Left" Margin="170,85,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" RenderTransformOrigin="0.333,-1.35" Click="OnClick"/>
        <Button x:Name="btn_8" Content="8" HorizontalAlignment="Left" Margin="105,85,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_7" Content="7" HorizontalAlignment="Left" Margin="40,85,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_0" Content="0" HorizontalAlignment="Left" Margin="105,220,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_dot" Content="." HorizontalAlignment="Left" Margin="40,220,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FFB6B6B6" Click="OnClick"/>
        <Button x:Name="btn_ce" Content="CE" HorizontalAlignment="Left" Margin="235,40,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FF9B9B9B" Click="OnClick" RenderTransformOrigin="0.717,-0.575"/>
        <Button x:Name="btn_plus" Content="+" HorizontalAlignment="Left" Margin="235,220,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FF75A079" Click="OnClick"/>
        <Button x:Name="btn_minus" Content="-" HorizontalAlignment="Left" Margin="235,175,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FF75A079" Click="OnClick" RenderTransformOrigin="1.883,0.6"/>
        <Button x:Name="btn_kerto" Content="*" HorizontalAlignment="Left" Margin="235,130,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FF75A079" Click="OnClick"/>
        <Button x:Name="btn_jako" Content="/" HorizontalAlignment="Left" Margin="235,85,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FF75A079" Click="OnClick" RenderTransformOrigin="0.533,-0.525"/>
        <Button x:Name="btn_calculate" Content="=" HorizontalAlignment="Left" Margin="170,220,0,0" VerticalAlignment="Top" Width="60" Height="40" FontSize="20" FontFamily="Showcard Gothic" Background="#FF5EBF70" Click="OnClick" RenderTransformOrigin="0.25,0.45"/>
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace calculator
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void OnClick(object sender, RoutedEventArgs e)
        {
            if(calc_Table.Text == "Epäonnistui")
            {
                calc_Table.Text = "0";
            }

            if(sender == btn_0)
            {
                addNumber(0);
            }
            else if (sender == btn_1)
            {
                addNumber(1);
            }
            else if (sender == btn_2)
            {
                addNumber(2);
            }
            else if (sender == btn_3)
            {
                addNumber(3);
            }
            else if (sender == btn_4)
            {
                addNumber(4);
            }
            else if (sender == btn_5)
            {
                addNumber(5);
            }
            else if (sender == btn_6)
            {
                addNumber(6);
            }
            else if (sender == btn_7)
            {
                addNumber(7);
            }
            else if (sender == btn_8)
            {
                addNumber(8);
            }
            else if (sender == btn_9)
            {
                addNumber(9);
            }
            else if(sender == btn_dot)
            {
                addDot();
            }
            else if(sender == btn_ce)
            {
                delete();
            }
            else if(sender == btn_plus)
            {
                check();
                calc_Table.Text += " + ";
            }
            else if(sender == btn_minus)
            {
                check();
                calc_Table.Text += " - ";
            }
            else if (sender == btn_jako)
            {
                check();
                calc_Table.Text += " / ";
            }
            else if (sender == btn_kerto)
            {
                check();
                calc_Table.Text += " * ";
            }
            else if(sender == btn_calculate)
            {
                if(calc_Table.Text.Substring(calc_Table.Text.Length - 1, 1) == " ")
                {
                    calc_Table.Text = "Epäonnistui";
                }
                else
                {
                    calculate();
                }
            }
        }

        private void check()
        {
            if (calc_Table.Text.Split(' ').Length == 3) calculate();
        }

        private void addNumber(int number)
        {
            if (calc_Table.Text == "0") calc_Table.Text = "";
            calc_Table.Text += number;
        }

        private void addDot()
        {
            if (calc_Table.Text.Length >= 1 && !(calc_Table.Text.Contains('.')))
                calc_Table.Text += ',';
        }

        private void delete()
        {
            if(calc_Table.Text.Substring(calc_Table.Text.Length - 1, 1) == " ")
            {
                calc_Table.Text = calc_Table.Text.Substring(0, calc_Table.Text.Length - 3);
            }
            else if (calc_Table.Text.Length <= 1)
            {
                calc_Table.Text = calc_Table.Text.Substring(0, calc_Table.Text.Length - 1);
                calc_Table.Text += 0;
            }
            else
            {
                calc_Table.Text = calc_Table.Text.Substring(0, calc_Table.Text.Length - 1);
            }
        }

        private void calculate()
        {
            StringBuilder sb = new StringBuilder();

            string[] numbersAndOperators = calc_Table.Text.Split(' ');
            double help;

            for (int i = 0; i < numbersAndOperators.Length; i++)
            {
                if(numbersAndOperators[i] == "*")
                {
                    help = double.Parse(numbersAndOperators[i - 1]) * double.Parse(numbersAndOperators[i + 1]);
                    numbersAndOperators[i] = help.ToString();
                    numbersAndOperators[i + 1] = "s";
                    numbersAndOperators[i - 1] = "s";

                    foreach (var place in numbersAndOperators)
                    {
                        if (place != "s") sb.Append(place + " ");
                    }

                    calc_Table.Text = sb.ToString().Substring(0, sb.ToString().Length - 1);
                }
                else if(numbersAndOperators[i] == "/")
                {
                    help = double.Parse(numbersAndOperators[i - 1]) / double.Parse(numbersAndOperators[i + 1]);
                    numbersAndOperators[i] = help.ToString();
                    numbersAndOperators[i + 1] = "s";
                    numbersAndOperators[i - 1] = "s";

                    foreach (var place in numbersAndOperators)
                    {
                        if (place != "s") sb.Append(place + " ");
                    }

                    calc_Table.Text = sb.ToString().Substring(0, sb.ToString().Length - 1);
                }
                else if(numbersAndOperators[i] == "+")
                {
                    help = double.Parse(numbersAndOperators[i - 1]) + double.Parse(numbersAndOperators[i + 1]);
                    numbersAndOperators[i] = help.ToString();
                    numbersAndOperators[i + 1] = "s";
                    numbersAndOperators[i - 1] = "s";

                    foreach (var place in numbersAndOperators)
                    {
                        if (place != "s") sb.Append(place + " ");
                    }

                    calc_Table.Text = sb.ToString().Substring(0, sb.ToString().Length - 1);
                }
                else if (numbersAndOperators[i] == "-")
                {
                    help = double.Parse(numbersAndOperators[i - 1]) - double.Parse(numbersAndOperators[i + 1]);
                    numbersAndOperators[i] = help.ToString();
                    numbersAndOperators[i + 1] = "s";
                    numbersAndOperators[i - 1] = "s";

                    foreach (var place in numbersAndOperators)
                    {
                        if (place != "s") sb.Append(place + " ");
                    }

                    calc_Table.Text = sb.ToString().Substring(0, sb.ToString().Length - 1);
                }
            }
        }
    }
}