import tkinter as tk from tkinter import messageboxroot = tk.Tk()def on_closing():if messagebox.askokcancel("Quit", "Do you want to quit?"):root.destroy()root.protocol("WM_DELETE_WINDOW", on_closing) root.mainloop()
转载于:https://www.cnblogs.com/navysummer/p/10648610.html
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![Luogu P3975 [TJOI2015]弦论](http://pic.xiahunao.cn/Luogu P3975 [TJOI2015]弦论)
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