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calculator_孙鑫礼_工物研2 #7

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11 changes: 11 additions & 0 deletions MAUICalculator/CalculatorState.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@

namespace MAUICalculator
{
public static class CalculatorState
{
public static double currentNumber { get; set; } = 0;
public static double lastNumber { get; set; } = 0;
public static string currentOperator { get; set; } = "";
public static bool isResult { get; set; }=false;
}
}
4 changes: 3 additions & 1 deletion MAUICalculator/MainPage.xaml
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Expand Up @@ -27,7 +27,9 @@
<Label x:Name="displayLabel" Text="0" FontSize="Large" HorizontalTextAlignment="End" Grid.Row="0" Grid.ColumnSpan="4" />

<!-- 使用Button创建键盘按钮，并占据特定的Grid位置，设置Clicked事件处理程序 -->
<Button Text="AC" Background="LightSkyBlue" Clicked="OnClearClicked" Grid.Row="1" Grid.Column="0" Grid.RowSpan="1" Grid.ColumnSpan="3"/>
<Button Text="AC" Background="LightSkyBlue" Clicked="OnClearClicked" Grid.Row="1" Grid.Column="0" Grid.RowSpan="1" Grid.ColumnSpan="2"/>
<Button Text="DEL" Background="LightSkyBlue" Clicked="OnDeleteClicked" Grid.Row="1" Grid.Column="2"/>

<Button Text="/" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="1" Grid.Column="3"/>

<Button Text="7" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="2" Grid.Column="0"/>
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161 changes: 119 additions & 42 deletions MAUICalculator/MainPage.xaml.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,10 +10,10 @@ public MainPage()
}

// 定义一些变量来存储当前输入的数字，当前选择的运算符，以及上一次计算的结果
private double currentNumber = 0;
private double lastNumber = 0;
private string currentOperator = "";
private bool isResult = false;
//private double currentNumber = 0;
//private double lastNumber = 0;
//private string currentOperator = "";
//private bool isResult = false;

// 定义OnNumberClicked方法来处理数字按钮点击事件
private void OnNumberClicked(object sender, EventArgs e)
Expand All @@ -23,17 +23,17 @@ private void OnNumberClicked(object sender, EventArgs e)
var number = button.Text;

// 如果当前显示的是结果，或者是0，就清空显示屏
if (isResult || displayLabel.Text == "0")
if (CalculatorState.isResult || displayLabel.Text == "0")
{
displayLabel.Text = "";
if (number == ".")
displayLabel.Text = "0";
isResult = false;
CalculatorState.isResult = false;
}

// 将数字追加到显示屏，并更新当前输入的数字
displayLabel.Text += number;
currentNumber = double.Parse(displayLabel.Text);
CalculatorState.currentNumber = double.Parse(displayLabel.Text);
}

// 定义OnOperatorClicked方法来处理运算符按钮点击事件
Expand All @@ -43,72 +43,149 @@ private void OnOperatorClicked(object sender, EventArgs e)
var button = sender as Button;
var op = button.Text;

// 如果当前的运算符不为空，就执行上一次选择的运算，并显示结果
if (currentOperator != "")
// 如果当前的运算符不为空，根据最后输入的运算符进行更新，不进行运算
if (CalculatorState.currentOperator != "")
{
Calculate();
displayLabel.Text = lastNumber.ToString();
isResult = true;
//Calculate();
//displayLabel.Text = lastNumber.ToString();
//isResult = true;
CalculatorState.currentOperator = op;
}
else
{
// 否则，就将当前输入的数字赋值给上一次计算的结果
lastNumber = currentNumber;
CalculatorState.lastNumber = CalculatorState.currentNumber;
displayLabel.Text = "0";
isResult = false;
CalculatorState.isResult = false;
}

// 将当前选择的运算符赋值给变量，并清空当前输入的数字
currentOperator = op;
CalculatorState.currentOperator = op;
}

// 定义OnEqualClicked方法来处理等号按钮点击事件
private void OnEqualClicked(object sender, EventArgs e)
{
// 如果当前选择的运算符不为空，就执行上一次选择的运算，并显示结果
if (currentOperator != "")
if (CalculatorState.currentOperator != "")
{
Calculate();
displayLabel.Text = lastNumber.ToString();
isResult = true;
currentOperator = "";
displayLabel.Text = CalculatorState.lastNumber.ToString();
CalculatorState.isResult = true;
CalculatorState.currentOperator = "";
}
}

// 定义OnEqualClicked方法来处理等号按钮点击事件
// 定义OnClearClicked方法来处理等号按钮点击事件
private void OnClearClicked(object sender, EventArgs e)
{
currentNumber = 0;
lastNumber = 0;
currentOperator = "";
isResult = false;
displayLabel.Text = lastNumber.ToString();
CalculatorState.currentNumber = 0;
CalculatorState.lastNumber = 0;
CalculatorState.currentOperator = "";
CalculatorState.isResult = false;
displayLabel.Text = CalculatorState.lastNumber.ToString();
}

// 定义Calculate方法来执行运算逻辑
private void Calculate()
{
// 根据当前选择的运算符，对上一次计算的结果和当前输入的数字进行相应的运算，并更新上一次计算的结果
switch (currentOperator)
try
{
switch (CalculatorState.currentOperator)
{
case "ln":
if (CalculatorState.currentNumber <= 0)
throw new ArgumentOutOfRangeException("Logarithm of non-positive numbers is undefined.");
CalculatorState.lastNumber = Math.Log(CalculatorState.currentNumber);
break;

case "x^y":
CalculatorState.lastNumber = Math.Pow(CalculatorState.lastNumber, CalculatorState.currentNumber);
break;

case "sin":
CalculatorState.lastNumber = Math.Sin(CalculatorState.currentNumber);
break;

case "cos":
CalculatorState.lastNumber = Math.Cos(CalculatorState.currentNumber);
break;

case "+":
CalculatorState.lastNumber += CalculatorState.currentNumber;
break;
case "-":
CalculatorState.lastNumber -= CalculatorState.currentNumber;
break;
case "*":
CalculatorState.lastNumber *= CalculatorState.currentNumber;
break;
case "/":
CalculatorState.lastNumber /= CalculatorState.currentNumber;
break;

default:
throw new InvalidOperationException("Invalid operator");
}

CalculatorState.lastNumber = Math.Round(CalculatorState.lastNumber, 4);
CalculatorState.currentNumber = CalculatorState.lastNumber;
}
catch (Exception ex)
{
CalculatorState.lastNumber = -99999;
CalculatorState.currentNumber = 0;
}
}

/// <summary>
/// 定义DEL按键所执行的命令
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnDeleteClicked(object sender, EventArgs e)
{
// displayLabel.Text = $@"
//currentN = {currentNumber},lastN = {lastNumber},currentOp = {currentOperator},isResult = {isResult}
//";
// 当上一个字符为`=`时，清空显示屏但不改变`lastNumber`的值
if (CalculatorState.isResult) {
displayLabel.Text = "";
}
else
{
case "+":
lastNumber += currentNumber;
break;
case "-":
lastNumber -= currentNumber;
break;
case "*":
lastNumber *= currentNumber;
break;
case "/":
lastNumber /= currentNumber;
break;
default:
break;
// 简化考虑：
// (1) 上一个字符为运算符 <=> 屏幕显示为"0"
// (2) 上一个字符为数字 <=> 屏幕显示为非零数字
if (displayLabel.Text == "0")
{
CalculatorState.currentOperator = "";
}
else if (displayLabel.Text != "")
{
// 若上一个字符为数字 从屏幕显示字符串中删除最后一个字符
displayLabel.Text = displayLabel.Text.Remove(
displayLabel.Text.Length - 1, 1
);
// 然后转化为浮点数 更新currentNumber
if (displayLabel.Text != "")
CalculatorState.currentNumber = double.Parse(displayLabel.Text);
else
CalculatorState.currentNumber = 0;
}

}
lastNumber = Math.Round(lastNumber, 4);
currentNumber = lastNumber;
}


// 切换时保证显示的内容的一致
protected override void OnAppearing()
{
base.OnAppearing();
displayLabel.Text = CalculatorState.currentNumber.ToString(); // 或根据需要显示的内容更新
}

}

}
57 changes: 51 additions & 6 deletions MAUICalculator/SubPage.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,55 @@
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>
<!-- 使用Grid作为根布局 -->
<Grid RowSpacing="6" ColumnSpacing="6" Margin="20">

<!-- 设置六行四列的网格 -->
<Grid.RowDefinitions>
<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>

<!-- 使用Label显示计算结果，并占据第一行四列 -->
<Label x:Name="displayLabel" Text="0" FontSize="Large" HorizontalTextAlignment="End" Grid.Row="0" Grid.ColumnSpan="4" />

<!-- 使用Button创建键盘按钮，并占据特定的Grid位置，设置Clicked事件处理程序 -->
<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="pi" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="1" Grid.Column="2"/>
<Button Text="e" Background="LightSkyBlue" Clicked="OnNumberClicked" Grid.Row="1" Grid.Column="3"/>


<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="x^y" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="2" Grid.Column="3"/>

<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="sin" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="3" Grid.Column="3"/>

<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="ln" Background="LightSkyBlue" Clicked="OnOperatorClicked" Grid.Row="4" Grid.Column="3"/>

<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"/>

</Grid>

</ContentPage>
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