编写程序，利用tkinter GUI 设计加法计算，将操作数据填入输入框后，单击“加法”按钮将算式和结果填入下方的结果文本框中，单击“清空”按钮将清空输入框和结果文本框

好的，下面是代码实现，需要安装 tkinter 库：

import tkinter as tk

class Calculator:
    def __init__(self, master):
        self.master = master
        master.title("加法计算器")
        
        # 输入框
        self.num1_label = tk.Label(master, text="第一个数：")
        self.num1_label.grid(row=0, column=0, padx=10, pady=10)
        self.num1_entry = tk.Entry(master)
        self.num1_entry.grid(row=0, column=1, padx=10, pady=10)
        
        self.num2_label = tk.Label(master, text="第二个数：")
        self.num2_label.grid(row=1, column=0, padx=10, pady=10)
        self.num2_entry = tk.Entry(master)
        self.num2_entry.grid(row=1, column=1, padx=10, pady=10)
        
        # 结果文本框
        self.result_label = tk.Label(master, text="计算结果：")
        self.result_label.grid(row=2, column=0, padx=10, pady=10)
        self.result_text = tk.Text(master, height=1)
        self.result_text.grid(row=2, column=1, padx=10, pady=10)
        
        # 加法按钮
        self.add_button = tk.Button(master, text="加法", command=self.add)
        self.add_button.grid(row=3, column=0, padx=10, pady=10)
        
        # 清空按钮
        self.clear_button = tk.Button(master, text="清空", command=self.clear)
        self.clear_button.grid(row=3, column=1, padx=10, pady=10)
        
    def add(self):
        try:
            num1 = float(self.num1_entry.get())
            num2 = float(self.num2_entry.get())
            result = num1 + num2
            self.result_text.delete(1.0, tk.END)
            self.result_text.insert(tk.END, str(num1) + " + " + str(num2) + " = " + str(result))
        except ValueError:
            self.result_text.delete(1.0, tk.END)
            self.result_text.insert(tk.END, "请输入正确的数字！")
            
    def clear(self):
        self.num1_entry.delete(0, tk.END)
        self.num2_entry.delete(0, tk.END)
        self.result_text.delete(1.0, tk.END)
        
root = tk.Tk()
calculator = Calculator(root)
root.mainloop()

运行后会弹出一个窗口，可以输入两个数，点击“加法”按钮进行计算，点击“清空”按钮清空输入框和结果文本框。