From fccb92afca75bb1e38f8c1b7c49da8b1e7f66811 Mon Sep 17 00:00:00 2001
From: shaoqy823 <shaoqy23@mails.tsinghua.edu.cn>
Date: Thu, 15 Aug 2024 19:11:30 +0800
Subject: [PATCH] =?UTF-8?q?calculator=5F=E9=82=B5=E5=8D=BF=E5=AE=87=5F?=
 =?UTF-8?q?=E6=97=A035?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 MAUICalculator/SubPage.xaml    |  66 +++++++++-
 MAUICalculator/SubPage.xaml.cs | 219 ++++++++++++++++++++++++++++++++-
 2 files changed, 274 insertions(+), 11 deletions(-)

diff --git a/MAUICalculator/SubPage.xaml b/MAUICalculator/SubPage.xaml
index 3e8a7a8..5011ad1 100644
--- a/MAUICalculator/SubPage.xaml
+++ b/MAUICalculator/SubPage.xaml
@@ -3,10 +3,64 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              x:Class="MAUICalculator.SubPage"
              Title="Advanced Calculator">
-    <VerticalStackLayout>
-        <Label 
-            Text="Implement your advanced calculaor here!"
-            VerticalOptions="Center" 
-            HorizontalOptions="Center" />
-    </VerticalStackLayout>
+    
+    <Grid RowSpacing="6" ColumnSpacing="6" Margin="20">
+        <!-- 设置七行四列的网格 -->
+        <Grid.RowDefinitions>
+            <RowDefinition Height="*" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="*" />
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="*" />
+            <ColumnDefinition Width="*" />
+            <ColumnDefinition Width="*" />
+            <ColumnDefinition Width="*" />
+        </Grid.ColumnDefinitions>
+
+        <!-- 显示计算结果 -->
+        <Label x:Name="displayLabel" Text="0" FontSize="Large" HorizontalTextAlignment="End" Grid.Row="0" Grid.ColumnSpan="4" />
+
+        <!-- 第一行：AC、DEL、切换回主页面、除法 -->
+        <Button Text="AC" Background="LightSkyBlue" Clicked="OnClearClicked" Grid.Row="1" Grid.Column="0"/>
+        <Button Text="DEL" Background="LightSkyBlue" Clicked="OnDeleteClicked" Grid.Row="1" Grid.Column="1"/>
+        <Button Text="Main" Background="LightSkyBlue" Clicked="OnMainPageClicked" Grid.Row="1" Grid.Column="2"/>
+        <Button Text="/" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="1" Grid.Column="3"/>
+
+        <!-- 第二行：7、8、9、乘法 -->
+        <Button Text="7" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="2" Grid.Column="0"/>
+        <Button Text="8" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="2" Grid.Column="1"/>
+        <Button Text="9" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="2" Grid.Column="2"/>
+        <Button Text="*" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="2" Grid.Column="3"/>
+
+        <!-- 第三行：4、5、6、减法 -->
+        <Button Text="4" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="3" Grid.Column="0"/>
+        <Button Text="5" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="3" Grid.Column="1"/>
+        <Button Text="6" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="3" Grid.Column="2"/>
+        <Button Text="-" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="3" Grid.Column="3"/>
+
+        <!-- 第四行：1、2、3、加法 -->
+        <Button Text="1" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="4" Grid.Column="0"/>
+        <Button Text="2" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="4" Grid.Column="1"/>
+        <Button Text="3" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="4" Grid.Column="2"/>
+        <Button Text="+" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="4" Grid.Column="3"/>
+
+        <!-- 第五行：0、小数点、等号 -->
+        <Button Text="0" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="5" Grid.Column="0" Grid.ColumnSpan="2"/>
+        <Button Text="." Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="5" Grid.Column="2"/>
+        <Button Text="=" Background="LightSkyBlue" Clicked="OnEqualClicked" Grid.Row="5" Grid.Column="3"/>
+
+        <!-- 第六行：乘方、对数、开根号、阶乘 -->
+        <Button Text="x^y" Background="LightSkyBlue" Clicked="OnAdvancedOperatorClicked" Grid.Row="6" Grid.Column="0"/>
+        <Button Text="lg" Background="LightSkyBlue" Clicked="OnAdvancedOperatorClicked" Grid.Row="6" Grid.Column="1"/>
+        <Button Text="√" Background="LightSkyBlue" Clicked="OnAdvancedOperatorClicked" Grid.Row="6" Grid.Column="2"/>
+        <Button Text="x!" Background="LightSkyBlue" Clicked="OnAdvancedOperatorClicked" Grid.Row="6" Grid.Column="3"/>
+
+    </Grid>
+    
 </ContentPage>
\ No newline at end of file
diff --git a/MAUICalculator/SubPage.xaml.cs b/MAUICalculator/SubPage.xaml.cs
index 0f9a3b9..1c82342 100644
--- a/MAUICalculator/SubPage.xaml.cs
+++ b/MAUICalculator/SubPage.xaml.cs
@@ -2,8 +2,217 @@ namespace MAUICalculator;
 
 public partial class SubPage : ContentPage
 {
-	public SubPage()
-	{
-		InitializeComponent();
-	}
-}
\ No newline at end of file
+    private double currentNumber = 0;
+    private double lastNumber = 0;
+    private string currentOperator = "";
+    private bool isResult = false;
+
+    public SubPage()
+    {
+        InitializeComponent();
+    }
+
+    private void OnNumberClicked(object sender, EventArgs e)
+    {
+        var button = sender as Button;
+        var number = button.Text;
+
+        if (isResult || displayLabel.Text == "0")
+        {
+            displayLabel.Text = "";
+            if (number == ".")
+                displayLabel.Text = "0";
+            isResult = false;
+        }
+
+        displayLabel.Text += number;
+        currentNumber = double.Parse(displayLabel.Text);
+    }
+
+    private void OnOperatorClicked(object sender, EventArgs e)
+    {
+        var button = sender as Button;
+        var op = button.Text;
+
+        if (isResult && currentOperator == "")
+        {
+            isResult = false;
+            displayLabel.Text = "0";
+        }
+
+        if (currentOperator != "")
+        {
+            if (!isResult)
+            {
+                Calculate();
+                displayLabel.Text = lastNumber.ToString();
+                isResult = true;
+            }
+        }
+        else
+        {
+            lastNumber = currentNumber;
+            displayLabel.Text = "0";
+            isResult = false;
+        }
+
+        currentOperator = op;
+    }
+
+    private void OnEqualClicked(object sender, EventArgs e)
+    {
+        if (currentOperator != "")
+        {
+            Calculate();
+            displayLabel.Text = lastNumber.ToString();
+            isResult = true;
+            currentOperator = "";
+        }
+    }
+
+    private void OnClearClicked(object sender, EventArgs e)
+    {
+        currentNumber = 0;
+        lastNumber = 0;
+        currentOperator = "";
+        isResult = false;
+        displayLabel.Text = "0";
+    }
+
+    private void OnDeleteClicked(object sender, EventArgs e)
+    {
+        if (displayLabel.Text.Length > 0)
+        {
+            if (displayLabel.Text == lastNumber.ToString() && isResult)
+            {
+                displayLabel.Text = "0";
+                isResult = false;
+            }
+            else
+            {
+                displayLabel.Text = displayLabel.Text.Substring(0, displayLabel.Text.Length - 1);
+                if (displayLabel.Text.Length == 0 || displayLabel.Text == "-")
+                    displayLabel.Text = "0";
+            }
+
+            currentNumber = double.TryParse(displayLabel.Text, out double parsedValue) ? parsedValue : 0;
+        }
+    }
+
+    private async void OnMainPageClicked(object sender, EventArgs e)
+    {
+        await Shell.Current.GoToAsync("//MainPage");
+    }
+
+    private void OnAdvancedOperatorClicked(object sender, EventArgs e)
+    {
+        var button = sender as Button;
+        var op = button.Text;
+
+        switch (op)
+        {
+            case "x^y":
+                if (currentOperator == "x^y" && !isResult)
+                {
+                    // ���֮ǰ�Ѿ�ѡ���˳˷����������һ�û�еõ����
+                    lastNumber = Math.Pow(lastNumber, currentNumber);
+                    displayLabel.Text = lastNumber.ToString();
+                    isResult = true;
+                }
+                else
+                {
+                    // ���浱ǰ����Ļ���
+                    lastNumber = currentNumber;
+                    currentOperator = "x^y"; // ������
+                    isResult = false;
+                    displayLabel.Text = "0"; // ׼������ָ��
+                }
+                break;
+            case "lg":
+                if (currentNumber <= 0)
+                {
+                    displayLabel.Text = "Error";
+                }
+                else
+                {
+                    lastNumber = Math.Log10(currentNumber);
+                    displayLabel.Text = lastNumber.ToString();
+                }
+                isResult = true;
+                break;
+            case "��":
+                if (currentNumber < 0)
+                {
+                    displayLabel.Text = "Error";
+                }
+                else
+                {
+                    lastNumber = Math.Sqrt(currentNumber);
+                    displayLabel.Text = lastNumber.ToString();
+                }
+                isResult = true;
+                break;
+            case "x!":
+                if (currentNumber < 0 || currentNumber != (int)currentNumber)
+                {
+                    displayLabel.Text = "Error";
+                }
+                else
+                {
+                    lastNumber = Factorial((int)currentNumber);
+                    displayLabel.Text = lastNumber.ToString();
+                }
+                isResult = true;
+                break;
+            default:
+                break;
+        }
+    }
+
+    private void Calculate()
+    {
+        switch (currentOperator)
+        {
+            case "+":
+                lastNumber += currentNumber;
+                break;
+            case "-":
+                lastNumber -= currentNumber;
+                break;
+            case "*":
+                lastNumber *= currentNumber;
+                break;
+            case "/":
+                if (currentNumber == 0)
+                {
+                    displayLabel.Text = "Error";
+                    return;
+                }
+                lastNumber /= currentNumber;
+                break;
+            case "x^y":
+                lastNumber = Math.Pow(lastNumber, currentNumber);
+                break;
+            default:
+                break;
+        }
+        lastNumber = Math.Round(lastNumber, 4);
+        currentNumber = lastNumber;
+    }
+
+    private double Factorial(int n)
+    {
+        if (n < 0)
+            return double.NaN; // Return NaN for negative inputs
+        if (n == 0 || n == 1)
+            return 1;
+        double result = 1;
+        for (int i = 2; i <= n; i++)
+        {
+            result *= i;
+        }
+        return result;
+    }
+}
+
+