需求分析：作为一名小学生的家长，我希望制作一个出题软件，完成100以内的正整数的加减法题./....以减轻我的家庭负担？
这是一个程序，实现简单出题并提供答案就行。
import tkinter
import random
from fractions import Fraction
m=['+','-','×','÷']
nn='0'
window = tkinter.Tk()
window.title('四则运算')
window.geometry('300x150')
m1=tkinter.StringVar()
m1.set('')
m2=tkinter.StringVar()
m2.set('')
m3=tkinter.StringVar()
m3.set('')
m4=tkinter.StringVar()
m4.set('')
name=tkinter.Label(text='算式:',justify=tkinter.RIGHT,width=80)
name.place(x=5,y=5,width=80,height=20)
m1name=tkinter.Label(width=80,textvariable=m1)
m1name.place(x=60,y=5,width=80,height=20)
en=tkinter.Entry(width=80,textvariable=m3)
en.place(x=180,y=5,width=80,height=20)
name2=tkinter.Label(text='结果:',justify=tkinter.RIGHT,width=80)
name2.place(x=5,y=30,width=80,height=20)
m2name=tkinter.Label(width=80,textvariable=m2)
m2name.place(x=60,y=30,width=80,height=20)
name3=tkinter.Label(text='答案:',justify=tkinter.RIGHT,width=80)
name3.place(x=5,y=60,width=80,height=20)
m4name=tkinter.Label(width=80,textvariable=m4)
m4name.place(x=75,y=60,width=50,height=20)
def s():
b['text']='下一题'
b2['text'] = '真分数'
m1.set('')
m2.set('')
m3.set('')
m4.set('')
mm = f()
a = mm
def g(a):
nn = en.get()
if str(nn) == str(mm):
m2.set('正确')
else:
m2.set('错误')
m4.set(mm)
en.bind('<Key-Return>', g)
def s1():
b['text'] = '整数'
b2['text']='下一题'
m1.set('')
m2.set('')
m3.set('')
m4.set('')
mm = f2()
a=mm
def g(a):
nn = en.get()
if str(nn) == str(mm):
m2.set('正确')
else:
m2.set('错误')
m4.set(mm)
en.bind('<Key-Return>', g)
def s2():
window.destroy()
b=tkinter.Button(text='整数',command=s)
b.place(x=60,y=90,width=50,height=20)
b2=tkinter.Button(text='真分数',command=s1)
b2.place(x=120,y=90,width=50,height=20)
b1=tkinter.Button(text='关闭',command=s2)
b1.place(x=180,y=90,width=50,height=20)
def f():
f=random.randint(0,3)
n1=random.randint(1,100)
n2=random.randint(1,100)
r = 0
if f==0:
r=n1+n2
elif f==1:
n1,n2=max(n1,n2),min(n1,n2)
r=n1-n2
elif f==2:
r=n1*n2
elif f==3:
if n1==n2:
r=1
else:
n1, n2 = max(n1, n2), min(n1, n2)
if n2==1:
r=n1
else:
while n1 % n2 != 0:
n1 = random.randint(1, 10)
n2 = random.randint(1, 10)
n1, n2 = max(n1, n2), min(n1, n2)
r = int(n1 / n2)
a=str(n1)+str(m[f])+str(n2)+'='
m1.set(a)
return r
def f2():
q = []
f = random.randint(0, 3)
t1 = random.randint(0, 20)
t2 = random.randint(t1, 20)
a = Fraction(t1, t2)
t1 = random.randint(0, 20)
t2 = random.randint(t1, 20)
b = Fraction(t1, t2)
if f==0: # 加法
q.append(a + b)
q.append(str(a)+m[f]+str(b))
m1.set(q[1])
return q[0]
elif f==1: # 减法
if a < b:
tm = a
a = b
b = tm
q.append(a - b)
q.append(str(a) + m[f] + str(b))
m1.set(q[1])
return q[0]
elif f==2: # 乘法
q.append(a * b)
q.append(str(a) + m[f] + str(b))
m1.set(q[1])
return q[0]
else: # 除法
c = Fraction(a, b)
q.append(str(c))
q.append(str(a) + m[f] + str(b))
m1.set(q[1])
return q[0]
window.mainloop()