import tkinter as tk from tkinter import font class Calculator: def __init__(self, root): self.root = root self.root.title("Python计算器") self.root.geometry("350x500") self.root.resizable(False, False) # 设置颜色主题 self.bg_color = "#2b2b2b" self.btn_bg = "#3c3c3c" self.btn_fg = "#ffffff" self.display_bg = "#1e1e1e" self.display_fg = "#ffffff" self.operator_color = "#ff9500" self.special_color = "#a6a6a6" self.root.configure(bg=self.bg_color) # 创建字体 self.display_font = font.Font( family="Segoe UI", size=24, weight="bold") self.button_font = font.Font(family="Segoe UI", size=18) # 计算器状态 self.current_input = "0" self.previous_input = "" self.operator = "" self.waiting_for_new_input = False self.decimal_used = False # 创建界面 self.create_widgets() def create_widgets(self): # 创建显示区域 self.display_frame = tk.Frame( self.root, bg=self.display_bg, height=120) self.display_frame.pack(fill=tk.X, padx=10, pady=(10, 5)) # 上部显示区域（历史记录） self.history_label = tk.Label( self.display_frame, text="", bg=self.display_bg, fg="#888888", font=("Segoe UI", 12), anchor="e" ) self.history_label.pack(fill=tk.X, padx=10, pady=(10, 0)) # 主显示区域 self.display_label = tk.Label( self.display_frame, text="0", bg=self.display_bg, fg=self.display_fg, font=self.display_font, anchor="e" ) self.display_label.pack(fill=tk.X, padx=10, pady=(5, 10)) # 创建按钮区域 self.button_frame = tk.Frame(self.root, bg=self.bg_color) self.button_frame.pack(fill=tk.BOTH, expand=True, padx=10, pady=5) # 按钮布局 buttons = [ ("C", 1, 0, self.special_color, self.clear_all), ("±", 1, 1, self.special_color, self.negate), ("%", 1, 2, self.special_color, self.percentage), ("÷", 1, 3, self.operator_color, lambda: self.set_operator("÷")), ("7", 2, 0, self.btn_bg, lambda: self.add_digit("7")), ("8", 2, 1, self.btn_bg, lambda: self.add_digit("8")), ("9", 2, 2, self.btn_bg, lambda: self.add_digit("9")), ("×", 2, 3, self.operator_color, lambda: self.set_operator("×")), ("4", 3, 0, self.btn_bg, lambda: self.add_digit("4")), ("5", 3, 1, self.btn_bg, lambda: self.add_digit("5")), ("6", 3, 2, self.btn_bg, lambda: self.add_digit("6")), ("-", 3, 3, self.operator_color, lambda: self.set_operator("-")), ("1", 4, 0, self.btn_bg, lambda: self.add_digit("1")), ("2", 4, 1, self.btn_bg, lambda: self.add_digit("2")), ("3", 4, 2, self.btn_bg, lambda: self.add_digit("3")), ("+", 4, 3, self.operator_color, lambda: self.set_operator("+")), ("0", 5, 0, self.btn_bg, lambda: self.add_digit("0")), (".", 5, 1, self.btn_bg, self.add_decimal), ("=", 5, 2, self.operator_color, self.calculate, 2) ] # 创建按钮 for btn_text, row, col, color, command, *args in buttons: if btn_text == "0": btn = tk.Button( self.button_frame, text=btn_text, bg=color, fg=self.btn_fg, font=self.button_font, borderwidth=0, command=command ) btn.grid(row=row, column=col, columnspan=2, sticky="nsew", padx=2, pady=2) elif btn_text == "=" and args: btn = tk.Button( self.button_frame, text=btn_text, bg=color, fg=self.btn_fg, font=self.button_font, borderwidth=0, command=command ) btn.grid(row=row, column=col, columnspan=args[0], sticky="nsew", padx=2, pady=2) else: btn = tk.Button( self.button_frame, text=btn_text, bg=color, fg=self.btn_fg, font=self.button_font, borderwidth=0, command=command ) btn.grid(row=row, column=col, sticky="nsew", padx=2, pady=2) # 配置网格权重 for i in range(4): self.button_frame.columnconfigure(i, weight=1) for i in range(1, 6): self.button_frame.rowconfigure(i, weight=1) def add_digit(self, digit): if self.waiting_for_new_input or self.current_input == "0": self.current_input = digit self.waiting_for_new_input = False else: self.current_input += digit self.update_display() def add_decimal(self): if not self.decimal_used: if self.waiting_for_new_input or self.current_input == "0": self.current_input = "0." self.waiting_for_new_input = False else: self.current_input += "." self.decimal_used = True self.update_display() def set_operator(self, op): if self.operator and not self.waiting_for_new_input: self.calculate() self.previous_input = self.current_input self.operator = op self.waiting_for_new_input = True self.decimal_used = False # 更新历史显示 self.update_history() def calculate(self): if not self.operator or not self.previous_input: return try: num1 = float(self.previous_input) num2 = float(self.current_input) result = 0 if self.operator == "+": result = num1 + num2 elif self.operator == "-": result = num1 - num2 elif self.operator == "×": result = num1 * num2 elif self.operator == "÷": if num2 == 0: self.current_input = "错误" self.update_display() return result = num1 / num2 # 格式化结果 if result.is_integer(): self.current_input = str(int(result)) else: # 限制小数位数 self.current_input = f"{result:.10f}".rstrip('0').rstrip('.') if len(self.current_input) > 12: self.current_input = f"{result:.6e}" # 更新历史显示 self.history_label.config( text=f"{self.previous_input} {self.operator} {num2} =") self.operator = "" self.waiting_for_new_input = True self.decimal_used = "." in self.current_input self.update_display() except Exception as e: self.current_input = "错误" self.update_display() def clear_all(self): self.current_input = "0" self.previous_input = "" self.operator = "" self.waiting_for_new_input = False self.decimal_used = False self.history_label.config(text="") self.update_display() def clear_entry(self): self.current_input = "0" self.decimal_used = False self.update_display() def negate(self): if self.current_input != "0" and self.current_input != "错误": if self.current_input[0] == "-": self.current_input = self.current_input[1:] else: self.current_input = "-" + self.current_input self.update_display() def percentage(self): try: value = float(self.current_input) / 100 if value.is_integer(): self.current_input = str(int(value)) else: self.current_input = str(value) self.update_display() except: self.current_input = "错误" self.update_display() def update_display(self): # 限制显示长度 display_text = self.current_input if len(display_text) > 12: # 尝试用科学计数法显示 try: value = float(display_text) display_text = f"{value:.6e}" except: if len(display_text) > 12: display_text = display_text[:12] + "..." self.display_label.config(text=display_text) def update_history(self): if self.operator and self.previous_input: self.history_label.config( text=f"{self.previous_input} {self.operator}") else: self.history_label.config(text="") def main(): root = tk.Tk() calculator = Calculator(root) root.mainloop() if __name__ == "__main__": main()