使用递归

法1

#!/usr/bin/python3
#-*-encoding:utf-8-*-
#@project = demo920
#@file = test3
#@author = angel
#@creat_time = 2018/9/20 9:28

import  random
number =random.randint(1,100)
def fib():

    guess = int(input('输入一个数字'))
    if guess==number:
        print('你猜对了')
        exit(0)
    else:

        if guess<number:
            print('你猜小了')
        else:
            print('你猜大了')
        fib()

fib()

法2

#!/usr/bin/python3
#-*-encoding:utf-8-*-
#@project = demo920
#@file = test2
#@author = angel
#@creat_time = 2018/9/20 9:14

import  random
number = random.randint(1,100)
def game1(lower=1,upper=100):
    print("the number is in (%d,%d)" % (lower,upper))
    guess = int(input("enter your guess:"))
    if not upper >= guess >= lower:
        print("your guess is not in (%d,%d),please enter a new number" % (lower,upper))
        game1(lower=lower,upper=upper)
    elif guess > number:
        print("your guess is bigger than the number")
        game1(lower=lower,upper=guess-1)
    elif guess < number :
        print("your guess is smaller than the number")
        game1(lower=guess+1,upper=upper)
    else:
        print("you win")

game1()