科学计算器桌面版：支持三角函数/对数/幂运算/阶乘/常数/历史记录

🖥️ 运行效果

🚀 实例简介

一款功能完整的科学计算器桌面应用，支持基础四则运算、三角函数(sin/cos/tan)、对数(ln/log₁₀)、幂运算(x²/xⁿ)、阶乘(n!)、数学常数(π/e)、倒数(1/x)等科学计算功能，并带有计算历史记录功能。

💻 核心代码

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
科学计算器桌面版
支持基础四则运算、三角函数、对数、幂运算、阶乘、常数、历史记录
"""

import tkinter as tk
from tkinter import ttk, messagebox
import math
import platform

CHINESE_FONT = "WenQuanYi Zen Hei" if platform.system() == "Linux" else "Microsoft YaHei"

class ScientificCalculator:
    def __init__(self, root):
        self.root = root
        self.root.title("科学计算器桌面版")
        self.root.geometry("520x620")
        self.root.resizable(False, False)
        
        self.expression = ""
        self.history = []
        self.setup_ui()
    
    def setup_ui(self):
        # 标题
        tk.Label(self.root, text="🔢 科学计算器", 
                 font=(CHINESE_FONT, 16, "bold")).pack(pady=8)
        
        # 显示区域
        display_frame = ttk.Frame(self.root)
        display_frame.pack(fill=tk.X, padx=15, pady=5)
        
        self.expr_var = tk.StringVar(value="")
        tk.Label(display_frame, textvariable=self.expr_var,
                 font=(CHINESE_FONT, 11), fg="gray").pack(anchor=tk.E)
        
        self.display_var = tk.StringVar(value="0")
        tk.Label(display_frame, textvariable=self.display_var,
                 font=(CHINESE_FONT, 22, "bold"), fg="#333").pack(anchor=tk.E)
        
        # 按钮区域
        btn_frame = ttk.Frame(self.root)
        btn_frame.pack(fill=tk.BOTH, expand=True, padx=15, pady=5)
        
        # 科学函数按钮行
        sci_buttons = [
            ("sin", "sin"), ("cos", "cos"), ("tan", "tan"),
            ("ln", "log"), ("log₁₀", "log10"), ("√", "sqrt"),
            ("x²", "square"), ("xⁿ", "power"), ("n!", "factorial"),
            ("π", "pi"), ("e", "euler"), ("1/x", "reciprocal")
        ]
        
        for i, (text, func) in enumerate(sci_buttons):
            row, col = divmod(i, 6)
            tk.Button(btn_frame, text=text, font=(CHINESE_FONT, 10),
                     width=7, height=1, bg="#E3F2FD",
                     command=lambda f=func: self.scientific_func(f)).grid(
                     row=row, column=col, padx=2, pady=2)
        
        # 数字和运算符按钮
        num_buttons = [
            ("C", 4, 0, "#FFCDD2"), ("←", 4, 1, "#FFF9C4"),
            ("%", 4, 2, "#FFF9C4"), ("÷", 4, 3, "#C8E6C9"),
            ("7", 5, 0, "#FFFFFF"), ("8", 5, 1, "#FFFFFF"),
            ("9", 5, 2, "#FFFFFF"), ("×", 5, 3, "#C8E6C9"),
            ("4", 6, 0, "#FFFFFF"), ("5", 6, 1, "#FFFFFF"),
            ("6", 6, 2, "#FFFFFF"), ("-", 6, 3, "#C8E6C9"),
            ("1", 7, 0, "#FFFFFF"), ("2", 7, 1, "#FFFFFF"),
            ("3", 7, 2, "#FFFFFF"), ("+", 7, 3, "#C8E6C9"),
            ("0", 8, 0, "#FFFFFF"), (".", 8, 1, "#FFFFFF"),
            ("(", 8, 2, "#FFFFFF"), (")", 8, 3, "#FFFFFF"),
        ]
        
        for text, row, col, bg in num_buttons:
            cmd = (self.clear if text == "C" else
                   self.backspace if text == "←" else
                   lambda t=text: self.append_char(t))
            tk.Button(btn_frame, text=text, font=(CHINESE_FONT, 14),

💡 适用场景

办公自动化、数据分析、快速原型开发