import tkinter as tk from tkinter import font class Calculator: def __init__(self, root): self.root = root self.root.title("计算器") self.root.geometry("350x500") self.root.resizable(False, False) # 设置字体 self.display_font = font.Font(family="Arial", size=24, weight="bold") self.button_font = font.Font(family="Arial", size=16) # 存储当前输入 self.current_input = "0" self.total_expression = "" self.operation = None self.overwrite = True # 创建显示区域 self.create_display() # 创建按钮 self.create_buttons() # 绑定键盘事件 self.root.bind("", self.key_press) def create_display(self): # 创建显示框框架 display_frame = tk.Frame(self.root, height=100, bg="#f0f0f0") display_frame.pack(expand=True, fill="both", padx=10, pady=(10, 5)) # 总表达式显示 self.total_label = tk.Label( display_frame, text=self.total_expression, anchor=tk.E, bg="#f0f0f0", fg="#666", font=self.button_font ) self.total_label.pack(expand=True, fill="both", padx=10, pady=(5, 0)) # 当前输入显示 self.current_label = tk.Label( display_frame, text=self.current_input, anchor=tk.E, bg="#f0f0f0", fg="#000", font=self.display_font ) self.current_label.pack(expand=True, fill="both", padx=10, pady=(0, 5)) def create_buttons(self): # 创建按钮框架 buttons_frame = tk.Frame(self.root) buttons_frame.pack(expand=True, fill="both", padx=10, pady=5) # 按钮布局 buttons = [ ("C", 1, 0, 2, "special", self.clear), ("⌫", 1, 2, 2, "special", self.backspace), ("÷", 1, 3, 2, "operator", lambda: self.operator_click("/")), ("7", 2, 0, 1, "number", lambda: self.number_click(7)), ("8", 2, 1, 1, "number", lambda: self.number_click(8)), ("9", 2, 2, 1, "number", lambda: self.number_click(9)), ("×", 2, 3, 2, "operator", lambda: self.operator_click("*")), ("4", 3, 0, 1, "number", lambda: self.number_click(4)), ("5", 3, 1, 1, "number", lambda: self.number_click(5)), ("6", 3, 2, 1, "number", lambda: self.number_click(6)), ("-", 3, 3, 2, "operator", lambda: self.operator_click("-")), ("1", 4, 0, 1, "number", lambda: self.number_click(1)), ("2", 4, 1, 1, "number", lambda: self.number_click(2)), ("3", 4, 2, 1, "number", lambda: self.number_click(3)), ("+", 4, 3, 2, "operator", lambda: self.operator_click("+")), ("0", 5, 0, 1, "number", lambda: self.number_click(0)), (".", 5, 1, 1, "number", lambda: self.decimal_click()), ("=", 5, 2, 2, "equals", self.equals_click) ] # 按钮颜色配置 colors = { "number": {"bg": "#f0f0f0", "fg": "#000", "active_bg": "#e0e0e0"}, "operator": {"bg": "#4a90e2", "fg": "#fff", "active_bg": "#3a80d2"}, "special": {"bg": "#ff6b6b", "fg": "#fff", "active_bg": "#ff5b5b"}, "equals": {"bg": "#4CAF50", "fg": "#fff", "active_bg": "#3d8b40"} } # 创建按钮 for (text, row, col, colspan, btn_type, command) in buttons: btn_frame = tk.Frame(buttons_frame) btn_frame.grid(row=row, column=col, columnspan=colspan, sticky="nsew", padx=2, pady=2) btn_frame.grid_rowconfigure(0, weight=1) btn_frame.grid_columnconfigure(0, weight=1) btn = tk.Button( btn_frame, text=text, font=self.button_font, bg=colors[btn_type]["bg"], fg=colors[btn_type]["fg"], activebackground=colors[btn_type]["active_bg"], activeforeground=colors[btn_type]["fg"], relief="flat", borderwidth=0, cursor="hand2", command=command ) btn.pack(expand=True, fill="both", ipady=10) # 配置网格权重 for i in range(6): buttons_frame.grid_rowconfigure(i, weight=1) for i in range(4): buttons_frame.grid_columnconfigure(i, weight=1) def update_display(self): """更新显示内容""" self.current_label.config(text=self.current_input) self.total_label.config(text=self.total_expression) def number_click(self, num): """处理数字按钮点击""" if self.current_input == "0" or self.overwrite: self.current_input = str(num) self.overwrite = False else: self.current_input += str(num) self.update_display() def operator_click(self, op): """处理运算符点击""" if not self.overwrite: if self.total_expression and self.operation: # 如果有之前的运算，先计算 self.calculate() self.total_expression = f"{self.current_input} {op}" self.operation = op self.overwrite = True else: # 更新运算符 if self.total_expression: self.total_expression = f"{self.total_expression.split()[0]} {op}" self.operation = op def decimal_click(self): """处理小数点点击""" if self.overwrite: self.current_input = "0." self.overwrite = False elif "." not in self.current_input: self.current_input += "." self.update_display() def clear(self): """清除所有""" self.current_input = "0" self.total_expression = "" self.operation = None self.overwrite = True self.update_display() def backspace(self): """删除最后一位""" if len(self.current_input) > 1 and not self.overwrite: self.current_input = self.current_input[:-1] else: self.current_input = "0" self.overwrite = True self.update_display() def calculate(self): """执行计算""" try: num1 = float(self.total_expression.split()[0]) num2 = float(self.current_input) if self.operation == "+": result = num1 + num2 elif self.operation == "-": result = num1 - num2 elif self.operation == "*": result = num1 * num2 elif self.operation == "/": if num2 == 0: raise ZeroDivisionError result = num1 / num2 else: return # 处理浮点数精度问题 if result.is_integer(): result = int(result) self.current_input = str(result) self.total_expression = "" self.operation = None self.overwrite = True except ZeroDivisionError: self.current_input = "错误：除以零" self.total_expression = "" self.operation = None self.overwrite = True except: self.current_input = "错误" self.total_expression = "" self.operation = None self.overwrite = True def equals_click(self): """处理等号点击""" if self.operation and not self.overwrite: self.calculate() self.update_display() def key_press(self, event): """处理键盘输入""" key = event.char if key in "0123456789": self.number_click(int(key)) elif key in "+-*/": operator_map = {"+": "+", "-": "-", "*": "×", "/": "÷"} self.operator_click(key) elif key == ".": self.decimal_click() elif key == "\r": # Enter键 self.equals_click() elif key == "\x08": # Backspace键 self.backspace() elif key == "c" or key == "C": self.clear() def main(): root = tk.Tk() calculator = Calculator(root) root.mainloop() if __name__ == "__main__": main()