【C#】bool(boolean) 邏輯/真值表和輸出

我目前正在嘗試複製一種將真值表轉換為C＃中的布林表示式的方法。我已經能夠生成3變數（a，b，c）真值表並將其顯示在多行文字框中。我建立了另外八個文字框，供使用者確定每個輸入的輸出：true(1)或false(0)。但是，在生成表格之後，如何顯示所有具有true值的輸出？

public partial class Form1 : Form
{
    public Form1() => InitializeComponent();

    string newLine = Environment.NewLine;
    bool a, b, c, d;

    private void Form1_Load(object sender, EventArgs e)
    {
        textBox1.AppendText(newLine + "A" + "\t" + "B" + "\t" + "C" + newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = true; b = true; c = true;

        textBox1.AppendText(newLine + a + "\t" + b +  "\t" + c +newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = true; b = true; c = false;

        textBox1.AppendText(newLine + a + "\t" + b + "\t" + c + newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = true; b = false; c = true;

        textBox1.AppendText(newLine + a + "\t" + b + "\t" + c + newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = true; b = false; c = false;

        textBox1.AppendText(newLine + a + "\t" + b + "\t" + c + newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = false; b = true; c = true;

        textBox1.AppendText(newLine + a + "\t" + b + "\t" + c + newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = false; b = true; c = false;

        textBox1.AppendText(newLine + a + "\t" + b + "\t" + c + newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = false; b = false; c = true;

        textBox1.AppendText(newLine + a + "\t" + b + "\t" + c + newLine);
        textBox1.AppendText("______________________________" + newLine);
        a = false; b = false; c = false;

        textBox1.AppendText(newLine + a + "\t" + b + "\t" + c + newLine);
        textBox1.AppendText("______________________________" + newLine);

    }

    private void button1_Click(object sender, EventArgs e)
    {
        //Grab true value outputs and display in string
    }
}

上表是一個示例。我想以某種方式顯示真實的輸出值：

結果如下：
否是是
是否是
真真假
是是是

解決辦法

嘗試封裝您的TruthItem（以及用於計算TruthValue的邏輯）。然後，使用真值表（生成，迭代，計算等）將很容易。

這是示例控制檯應用程式。它沒有您的文字框，但是您會明白的。

public abstract class ThreeItemTruthRow
{
    protected ThreeItemTruthRow(bool a, bool b, bool c)
    {
        A = a; B = b; C = c;
    }

    public bool A { get; protected set; }
    public bool B { get; protected set; }
    public bool C { get; protected set; }

    public abstract bool GetTruthValue();
}

public class MyCustomThreeItemTruthRow : ThreeItemTruthRow
{
    public MyCustomThreeItemTruthRow(bool a, bool b, bool c)
        : base(a, b, c)
    {
    }

    public override bool GetTruthValue()
    {
        // My custom logic
        return (!A && B && C) || (A && !B && C) || (A && B && !C) || (A && B && C);
    }
}

class Program
{
    static void Main(string[] args)
    {
        var myTruthTable = GenerateTruthTable().ToList();
        //Print only true values
        foreach (var item in myTruthTable)
        {
            if (item.GetTruthValue())
                Console.WriteLine("{0}, {1}, {2}", item.A, item.B, item.C);
        }
        ////Print all values
        //foreach (var itemTruthRow in myTruthTable)
        //{
        //    Console.WriteLine("{0}, {1}, {2}", itemTruthRow.A, itemTruthRow.B, itemTruthRow.C);
        //}
        ////Print only false values
        //foreach (var item in myTruthTable)
        //{
        //    if (!item.GetTruthValue())
        //        Console.WriteLine("{0}, {1}, {2}", item.A, item.B, item.C);
        //}
        Console.ReadLine();
    }
    public static IEnumerable<MyCustomThreeItemTruthRow> GenerateTruthTable()
    {
        for (var a = 0; a < 2; a++)
            for (var b = 0; b < 2; b++)
                for (var c = 0; c < 2; c++)
                    yield return new MyCustomThreeItemTruthRow(
                        Convert.ToBoolean(a),
                        Convert.ToBoolean(b),
                        Convert.ToBoolean(c));
    }
}

編輯（包括WinForm的示例程式碼）：

使用並引用上面的類（ThreeItemTruthRow和MyCustomThreeItemTruthRow）。

public partial class MainForm : Form

{
    public MainForm()
    {
        InitializeComponent();
    }

private void GenerateButton_Click(object sender, EventArgs e)
{
    OutputTextBox.Clear();
    OutputTextBox.Text += "A\tB\tC\r\n";
    OutputTextBox.Text += GetHorizontalLineText();

    var myTruthTable = GenerateTruthTable().ToList();
    foreach(var item in myTruthTable)
    {
        OutputTextBox.Text += GetFormattedItemText(item);
        OutputTextBox.Text += GetHorizontalLineText();
    }
}
private void ShowTrueValuesButton_Click(object sender, EventArgs e)
{
    OutputTextBox.Clear();
    OutputTextBox.Text += "True Values\r\n";
    OutputTextBox.Text += "A\tB\tC\r\n";
    OutputTextBox.Text += GetHorizontalLineText();

    var myTruthTable = GenerateTruthTable().ToList();
    foreach(var item in myTruthTable)
    {
        if(item.GetTruthValue())
            OutputTextBox.Text += GetFormattedItemText(item);
    }
}
private static string GetHorizontalLineText()
{
    return "-----------------------------------------------\r\n";
}
private static string GetFormattedItemText(MyCustomThreeItemTruthRow item)
{
    return string.Format("{0}\t{1}\t{2}\r\n", item.A, item.B, item.C);
}
private static IEnumerable<MyCustomThreeItemTruthRow> GenerateTruthTable()
{
    for (var a = 0; a < 2; a++)
        for (var b = 0; b < 2; b++)
            for (var c = 0; c < 2; c++)
                yield return new MyCustomThreeItemTruthRow(
                    Convert.ToBoolean(a),
                    Convert.ToBoolean(b),
                    Convert.ToBoolean(c));
    }
}

出處