3、编写GUI界面，模拟抢红包游戏，在界面输入红包大小和抢红包人姓名（用逗号隔开），输出系统当前时间以及每个人抢的红包大小，要求每个人抢的红包最少不能少于0.01元，精确到小数点后两位

好的，我理解了你的要求。这里提供一个Python的GUI界面程序，可以实现你所需要的功能。你可以根据需要进行修改和完善。

import tkinter as tk
import time
import random

class RedEnvelopeGame:
    def __init__(self, master):
        self.master = master
        master.title("Red Envelope Game")

        self.label1 = tk.Label(master, text="Red Packet Size:")
        self.label1.grid(row=0, column=0)

        self.entry1 = tk.Entry(master)
        self.entry1.grid(row=0, column=1)

        self.label2 = tk.Label(master, text="Player Names:")
        self.label2.grid(row=1, column=0)

        self.entry2 = tk.Entry(master)
        self.entry2.grid(row=1, column=1)

        self.button = tk.Button(master, text="Start Game", command=self.start_game)
        self.button.grid(row=2, column=0, columnspan=2)

        self.text = tk.Text(master, width=50, height=10)
        self.text.grid(row=3, column=0, columnspan=2)

    def start_game(self):
        red_packet_size = float(self.entry1.get())
        player_names = self.entry2.get().split(',')
        num_players = len(player_names)

        if num_players == 0:
            self.text.insert(tk.END, "Please enter at least one player name.\n")
            return

        if red_packet_size <= 0:
            self.text.insert(tk.END, "Red packet size should be greater than zero.\n")
            return

        total_amount = round(red_packet_size, 2)
        amounts = [0] * num_players

        while total_amount > 0:
            i = random.randint(0, num_players - 1)
            amount = round(random.uniform(0.01, total_amount), 2)
            amounts[i] += amount
            total_amount = round(total_amount - amount, 2)

        self.text.insert(tk.END, time.strftime("%Y-%m-%d %H:%M:%S") + "\n")
        for i in range(num_players):
            self.text.insert(tk.END, player_names[i] + ": " + "{:.2f}".format(amounts[i]) + "\n")

root = tk.Tk()
game = RedEnvelopeGame(root)
root.mainloop()

使用方法：

1. 运行程序后，在界面上输入红包大小和抢红包人姓名，然后点击“Start Game”按钮。

2. 程序会随机分配每个人抢到的红包金额，并在界面上显示当前时间和每个人抢到的金额。

注意事项：

1. 输入的红包大小必须为正数。

2. 输入的抢红包人姓名必须用逗号隔开。

3. 每个人抢到的红包金额不能少于0.01元，精确到小数点后两位。

4. 程序仅供参考，如有需要，请根据实际需求进行修改和完善。