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118
tools/CalculatorForm.cs
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118
tools/CalculatorForm.cs
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using System;
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using System.Drawing;
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using System.Windows.Forms;
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using AppStore;
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namespace AppStore
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{
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public class CalculatorForm : Form
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{
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private TextBox display = new TextBox();
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private double firstNumber = 0;
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private string operation = "";
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public CalculatorForm()
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{
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this.Text = "计算器";
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this.Size = new Size(300, 400);
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this.StartPosition = FormStartPosition.CenterScreen;
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CreateControls();
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}
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private void CreateControls()
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{
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// 显示框
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display = new TextBox();
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display.ReadOnly = true;
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display.TextAlign = HorizontalAlignment.Right;
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display.Font = new Font("Microsoft YaHei", 14);
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display.Size = new Size(260, 40);
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display.Location = new Point(20, 20);
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this.Controls.Add(display);
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// 按钮布局
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string[] buttonLabels = {
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"7", "8", "9", "/",
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"4", "5", "6", "*",
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"1", "2", "3", "-",
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"0", ".", "=", "+"
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};
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for (int i = 0; i < buttonLabels.Length; i++)
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{
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var btn = new Button();
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btn.Text = buttonLabels[i];
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btn.Size = new Size(60, 50);
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btn.Location = new Point(20 + (i % 4) * 65, 70 + (i / 4) * 55);
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btn.Font = new Font("Microsoft YaHei", 12);
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btn.Click += ButtonClickHandler;
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this.Controls.Add(btn);
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}
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// 清除按钮
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var clearBtn = new Button();
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clearBtn.Text = "C";
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clearBtn.Size = new Size(260, 40);
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clearBtn.Location = new Point(20, 300);
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clearBtn.Font = new Font("Microsoft YaHei", 12);
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clearBtn.Click += (s, e) => {
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display.Text = "";
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firstNumber = 0;
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operation = "";
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};
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this.Controls.Add(clearBtn);
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}
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private void ButtonClickHandler(object sender, EventArgs e)
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{
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var button = sender as Button;
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if (button == null) return;
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switch (button.Text)
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{
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case "+":
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case "-":
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case "*":
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case "/":
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if (!string.IsNullOrEmpty(display.Text))
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{
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firstNumber = double.Parse(display.Text);
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operation = button.Text;
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display.Text = "";
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}
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break;
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case "=":
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if (!string.IsNullOrEmpty(operation) && !string.IsNullOrEmpty(display.Text))
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{
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double secondNumber = double.Parse(display.Text);
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double result = 0;
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try
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{
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result = operation switch
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{
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"+" => AppStore.Calculator.Add(firstNumber, secondNumber),
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"-" => AppStore.Calculator.Subtract(firstNumber, secondNumber),
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"*" => AppStore.Calculator.Multiply(firstNumber, secondNumber),
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"/" => AppStore.Calculator.Divide(firstNumber, secondNumber),
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_ => 0
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};
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display.Text = result.ToString();
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}
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catch (DivideByZeroException)
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{
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MessageBox.Show("除数不能为零", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
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}
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operation = "";
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}
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break;
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default:
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display.Text += button.Text;
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break;
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}
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}
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}
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}
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