python生成计算机

如何制作计算器

import tkinter as tk
# 定义计算器类
class Calculator:
    def __init__(self, root):
        self.root = root
        self.root.title('简易计算器')
        # 初始化显示文本框
        self.display_text = tk.StringVar()
        self.display = tk.Entry(root, textvariable=self.display_text, justify='right', font=('Arial', 18))
        self.display.grid(row=0, column=0, columnspan=4, sticky='nsew', ipady=10)

        # 按钮布局
        buttons = [
            ('7', 1, 0), ('8', 1, 1), ('9', 1, 2), ('/', 1, 3),
            ('4', 2, 0), ('5', 2, 1), ('6', 2, 2), ('*', 2, 3),
            ('1', 3, 0), ('2', 3, 1), ('3', 3, 2), ('-', 3, 3),
            ('0', 4, 0), ('=', 4, 2), ('+', 4, 3), ('C', 4, 1)
        ]

        self.buttons = {}
        for (text, row, column) in buttons:
            self.buttons[text] = tk.Button(root, text=text, font=('Arial', 18), command=lambda x=text: self.button_click(x))
            self.buttons[text].grid(row=row, column=column)

        # 运算逻辑
        self.current_operator = None
        self.previous_number = ""
        self.current_number = ""

    def button_click(self, text):
        if text == 'C':
            self.display_text.set('')
            self.current_operator = None
            self.previous_number = ""
            self.current_number = ""
        elif text in '0123456789':
            self.current_number += text
            self.display_text.set(self.current_number)
        elif text == '=':
            if self.current_operator:
                self.compute()
        else:
            self.current_operator = text
            self.previous_number = self.current_number
            self.current_number = ""

    def compute(self):
        if self.previous_number and self.current_number and self.current_operator:
            try:
                result = eval(self.previous_number + self.current_operator + self.current_number)
                self.display_text.set(str(result))
                self.current_operator = None
                self.previous_number = str(result)
                self.current_number = ""
            except:
                self.display_text.set("Error")

# 创建主窗口
root = tk.Tk()
# 创建计算器实例
app = Calculator(root)
# 启动事件循环
root.mainloop()