from tkinter import *

win = Tk()

win.geometry('500x300+400+300')

win['bg'] = '#0099ff'

win.title('魔方小子')

e = Entry(win)

e.pack()

j = Label(win,text='+')

j.pack()

d = Entry(win)

d.pack()

i = Label(win,text='||')

i.pack()

s = Entry(win)

s.pack()

def fun():

    ej = int(e.get())

    de = int(d.get())

    t = ej + de

    t = str(t)

    s.insert(0,t)

def run():

    e.delete(0,END)

    d.delete(0,END)

    s.delete(0,END)

k = Button(win,text='计算',command=fun)

k.pack()

kb = Button(win,text='清除',command=run)

kb.pack()

win.mainloop()