当用户输入答案时，如何获取分配给正确和总数的值以进行更新

我有一个Python文件，该文件在运行时会打开一个窗口，供您进行简单的添加练习。它要求用户输入，如果总数正确，将输出“正确！”。和“糟糕！” 错误的。在所有这些下面的是一个计数器，用于跟踪总数中的正确数字。但是，此刻，当用户输入其输入时，这些数字均保持为零。为了使该程序正常运行，需要在ClicktheButton1函数下进行哪些更改？谢谢。

输出将最终在窗口中看起来像“ 2 out 4正确”，在解决每个新问题后进行更新。

from tkinter import *
import random as rn 
window = Tk()
window.geometry('350x350')
window.title("C200")
x = rn.randint(0,100)
y = rn.randint(0,100)
correct, incorrect = 0,0

myLabel = Label(window, text="{0}+{1}=".format(x,y), font=("Arial Bold", 15))
myLabel.grid(column=0, row=0)

myLable2 = Label(window, text = "",font=("Arial Bold", 15))
myLable2.grid(column=0, row=5)

mylabel3 = Label(window,text = "0 out of 0 correct",font=("Arial Bold", 15)) 
mylabel3.grid(column=0, row=10)

mytxt = Entry(window, width=12)
mytxt.grid(column=1,row=0)

def ClicktheButton1():


    global x
    global y

    global correct
    global incorrect


    myguess = int(mytxt.get())

    if x + y == myguess:
        myLable2.configure(text = "Right!")
        correct += 1
    else:
        myLable2.configure(text = "Oops!")
        incorrect += 1



    x = rn.randint(0,100)
    y = rn.randint(0,100)
    mytxt.focus()
    mytxt.delete(0,END)
    myLabel.configure(text = "{0}+{1}=".format(x,y))

btn1 = Button(window, text="check", command = ClicktheButton1)
btn1.grid(column=0, row=7)

def ClicktheButton2():
    window.destroy()

btn1 = Button(window, text="Quit", command = ClicktheButton2)
btn1.grid(column=400, row=400)


window.mainloop()