求最大公因数

while 1:
    
    s = input('请输入一个数：')
    e = input('请输入一个数：')
    s = int(s)
    e = int(e)
    if s == 0 or e == 0:
        print('错误')
        continue
    if s > e:
        f = e
    else:
        f = s
    while f:

        if s % f == 0 and e % f == 0:
            print(f)
            break
        else:
            f = f - 1