### 实现简易计算器 简易计算器可以通过 Python 的 `Tkinter` 库来创建图形用户界面 (GUI)，并实现基本的算术运算功能。下面是一个完整的简单计算器实例： ```python import tkinter as tk def button_click(number): current = entry.get() entry.delete(0, tk.END) entry.insert(tk.END, str(current) + str(number)) def button_clear(): entry.delete(0, tk.END) def button_add(): first_number = entry.get() global f_num global math_operation math_operation = "addition" f_num = int(first_number) entry.delete(0, tk.END) def button_subtract(): first_number = entry.get() global f_num global math_operation math_operation = "subtraction" f_num = int(first_number) entry.delete(0, tk.END) def button_multiply(): first_number = entry.get() global f_num global math_operation math_operation = "multiplication" f_num = int(first_number) entry.delete(0, tk.END) def button_divide(): first_number = entry.get() global f_num global math_operation math_operation = "division" f_num = int(first_number) entry.delete(0, tk.END) def button_equal(): second_number = entry.get() entry.delete(0, tk.END) if math_operation == "addition": entry.insert(tk.END, f_num + int(second_number)) elif math_operation == "subtraction": entry.insert(tk.END, f_num - int(second_number)) elif math_operation == "multiplication": entry.insert(tk.END, f_num * int(second_number)) elif math_operation == "division": try: result = f_num / int(second_number) entry.insert(tk.END, result) except ZeroDivisionError: entry.insert(tk.END, 'Error') root = tk.Tk() root.title("Simple Calculator") entry = tk.Entry(root, width=40, borderwidth=5) entry.grid(row=0, column=0, columnspan=3, padx=10, pady=10) button_1 = tk.Button(root, text="1", padx=40, pady=20, command=lambda: button_click(1)) button_2 = tk.Button(root, text="2", padx=40, pady=20, command=lambda: button_click(2)) button_3 = tk.Button(root, text="3", padx=40, pady=20, command=lambda: button_click(3)) button_4 = tk.Button(root, text="4", padx=40, pady=20, command=lambda: button_click(4)) button_5 = tk.Button(root, text="5", padx=40, pady=20, command=lambda: button_click(5)) button_6 = tk.Button(root, text="6", padx=40, pady=20, command=lambda: button_click(6)) button_7 = tk.Button(root, text="7", padx=40, pady=20, command=lambda: button_click(7)) button_8 = tk.Button(root, text="8", padx=40, pady=20, command=lambda: button_click(8)) button_9 = tk.Button(root, text="9", padx=40, pady=20, command=lambda: button_click(9)) button_0 = tk.Button(root, text="0", padx=40, pady=20, command=lambda: button_click(0)) button_add = tk.Button(root, text="+", padx=39, pady=20, command=button_add) button_equal = tk.Button(root, text="=", padx=91, pady=20, command=button_equal) button_clear = tk.Button(root, text="Clear", padx=79, pady=20, command=button_clear) button_subtract = tk.Button(root, text="-", padx=41, pady=20, command=button_subtract) button_multiply = tk.Button(root, text="*", padx=40, pady=20, command=button_multiply) button_divide = tk.Button(root, text="/", padx=41, pady=20, command=button_divide) button_1.grid(row=3, column=0) button_2.grid(row=3, column=1) button_3.grid(row=3, column=2) button_4.grid(row=2, column=0) button_5.grid(row=2, column=1) button_6.grid(row=2, column=2) button_7.grid(row=1, column=0) button_8.grid(row=1, column=1) button_9.grid(row=1, column=2) button_0.grid(row=4, column=0) button_clear.grid(row=4, column=1, columnspan=2) button_add.grid(row=5, column=0) button_equal.grid(row=5, column=1, columnspan=2) button_subtract.grid(row=6, column=0) button_multiply.grid(row=6, column=1) button_divide.grid(row=6, column=2) root.mainloop() ``` 此代码展示了如何使用 `Tkinter` 创建一个带有按钮和输入框的窗口应用程序，实现了加法、减法、乘法、除法以及清除操作的功能[^2]。