import tkinter as tk from tkinter import ttk import math import re class CalculatorGUI: def __init__(self, root): self.root = root self.root.title("科学计算器") self.root.geometry("400x550") self.root.resizable(False, False) self.root.configure(bg="#f0f0f0") # 设置中文字体 self.font = ("SimHei", 12) # 计算器逻辑 self.memory = 0 self.history = [] self.current_expression = "" self.last_result = None # 创建界面 self.create_widgets() def create_widgets(self): """创建计算器界面""" # 历史记录按钮 history_frame = tk.Frame(self.root, bg="#f0f0f0") history_frame.pack(pady=5, fill=tk.X, padx=10) history_button = tk.Button(history_frame, text="历史记录", font=self.font, command=self.show_history, bg="#2196F3", fg="white") history_button.pack(side=tk.RIGHT, padx=5) # 显示屏 display_frame = tk.Frame(self.root, bg="#f0f0f0") display_frame.pack(pady=10, fill=tk.X, padx=10) self.expression_var = tk.StringVar() self.expression_var.set("") self.result_var = tk.StringVar() self.result_var.set("0") expression_label = tk.Label(display_frame, textvariable=self.expression_var, font=("SimHei", 14), bg="white", anchor=tk.E, padx=10, pady=5) expression_label.pack(fill=tk.X) result_label = tk.Label(display_frame, textvariable=self.result_var, font=("SimHei", 24, "bold"), bg="white", anchor=tk.E, padx=10, pady=5) result_label.pack(fill=tk.X) # 按钮框架 buttons_frame = tk.Frame(self.root, bg="#f0f0f0") buttons_frame.pack(pady=10, fill=tk.BOTH, expand=True, padx=10) # 按钮布局 buttons = [ ['7', '8', '9', '/', 'C'], ['4', '5', '6', '*', 'CE'], ['1', '2', '3', '-', '√'], ['0', '.', '=', '+', '^'], ['(', ')', 'M+', 'M-', 'MR'] ] for i, row in enumerate(buttons): for j, text in enumerate(row): button = tk.Button(buttons_frame, text=text, font=self.font, width=7, height=2, bg="#e0e0e0", command=lambda txt=text: self.button_click(txt)) button.grid(row=i, column=j, padx=2, pady=2, sticky="nsew") # 配置网格权重，使按钮均匀分布 for i in range(len(buttons)): buttons_frame.grid_rowconfigure(i, weight=1) for j in range(len(buttons[0])): buttons_frame.grid_columnconfigure(j, weight=1) def button_click(self, text): """处理按钮点击事件""" if text == '=': self.calculate() elif text == 'C': self.current_expression = "" self.update_display() elif text == 'CE': # 删除最后一个字符 self.current_expression = self.current_expression[:-1] self.update_display() elif text == '√': self.current_expression += "sqrt(" self.update_display() elif text == '^': self.current_expression += "**" self.update_display() elif text == 'M+': self.current_expression += f"+{self.memory}" self.update_display() elif text == 'M-': self.current_expression += f"-{self.memory}" self.update_display() elif text == 'MR': self.current_expression += str(self.memory) self.update_display() else: self.current_expression += text self.update_display() def update_display(self): """更新显示屏""" self.expression_var.set(self.current_expression) # 如果表达式为空，显示0 if not self.current_expression: self.result_var.set("0") def calculate(self): """计算表达式结果""" if not self.current_expression: return expression = self.current_expression # 替换函数调用 pattern = r'sqrt\(([^)]+)\)' while re.search(pattern, expression): match = re.search(pattern, expression) arg = match.group(1) expression = expression.replace(match.group(0), f"math.sqrt({arg})") # 替换幂运算 expression = expression.replace('^', '**') try: # 计算表达式 result = eval(expression) # 更新历史记录 self.history.append(f"{self.current_expression} = {result}") # 更新显示 self.result_var.set(str(result)) self.last_result = result # 如果用户想继续计算，使用结果作为新表达式的开始 self.current_expression = str(result) except ZeroDivisionError: self.result_var.set("错误: 除数不能为零") except Exception as e: self.result_var.set(f"错误: {str(e)}") def show_history(self): """显示历史记录""" if not self.history: tk.messagebox.showinfo("历史记录", "暂无计算历史") return # 创建历史记录窗口 history_window = tk.Toplevel(self.root) history_window.title("计算历史") history_window.geometry("400x300") history_window.resizable(False, False) history_window.configure(bg="#f0f0f0") history_window.transient(self.root) # 使窗口成为主窗口的子窗口 # 创建历史记录列表 history_text = tk.Text(history_window, font=self.font, bg="white", wrap=tk.WORD) history_text.pack(fill=tk.BOTH, expand=True, padx=10, pady=10) # 插入历史记录 for i, entry in enumerate(self.history, 1): history_text.insert(tk.END, f"{i}. {entry}\n\n") # 使文本框只读 history_text.config(state=tk.DISABLED) # 关闭按钮 close_button = tk.Button(history_window, text="关闭", font=self.font, command=history_window.destroy, bg="#f44336", fg="white") close_button.pack(pady=10) # 启动计算器 if __name__ == "__main__": root = tk.Tk() app = CalculatorGUI(root) root.mainloop()