Python 基础小项目（1）---猜数字

今天写了两个猜数字的小游戏，一个是基于数学估计的方法，另一个为二分查找法。

1 数学估计方法：

# coding-utf-8
while True:
    try:
        num=int(input("enter a num:"))#输入数据
        print(num)#测试数据输入
    except ValueError:
        print("the num is not Integer")
        continue#如果错误，重新输入
    break
guess=num/2
middle=num/4
count=0#记录步数
while guess!=num:
    if guess > num:
        guess -= middle
        print("I guess:",guess)
    elif num > guess:
        guess += middle
        print("I guess:",guess)
    middle/=2
    if middle==0:
        middle=1
    count+=1
print("The anw is:",guess)
print("total step:",count)

运行结果：

2 折半查找法：

import random
a = random.randint(0,999)#在该范围 任取一数据
count = 0#记录运算次数
left= 0#范围下限
right = 999#范围上限
middle = int((left+right)/2)#取范围的中点
print(a)#要猜的数
while a !=middle:
 if a>middle:
  count=count+1
  print(count,middle)
  left=middle+1
  middle=int((left+right)/2)
 else:
  count=count+1
  print(count,middle)
  right=middle-1
  middle=int((left+right)/2)
count=count+1
print("the steps:",count)
print("guess num:",middle)

运行结果：