第四章课后习题 4.1-4.8

4.1 猜数字（含猜测次数）

 target = 425
guess, count = 0, 0
while True:
    guess = eval(input("请输入一个猜测的整数（1-1000）："))
    count += 1
    if guess > target:
        print("猜大了")
    elif guess < target:
        print("猜小了")
    else:
        print("猜对了,总共猜了{}次".format(count))
        break

 

4.2 不同字符统计

 s = input()
Eng, num, space, other = 0, 0, 0, 0 #英文，数字，空格，其他
for i in s:
    if 'a' <= i <= 'z':
        Eng += 1
    elif '0' <= i <='9':
        num += 1
    elif i == " ":
        space += 1
    else:
        other += 1
print(Eng, num, space, other)

 

4.3 最大公约数和最小公倍数

 def gcd_lcm():
    a, b = map(int, input().split())
    def gcd(x,y): #最大公约数
        while y:
            x, y = y, x%y
        return x 
    def lcm(x,y): #最小公倍数
        return x*y // gcd(x,y)
    g, l = gcd(a,b), lcm(a,b)
    print("最大公约数是{},最小公倍数是{}".format(g,l))

gcd_lcm()

 

4.4 猜数游戏续1

import random
target = random.randint(1,1000)
guess = 0
while guess != target:
    guess = eval(input("请输入一个整数（1-1000）："))
    if guess > target:
        print("猜大了")
    elif guess < target:
        print("猜小了")
    else:
        print("猜对了")

 

4.5 猜数游戏续2

 import random
target = random.randint(1,1000)
guess = 0
while True:
    try:
        guess = int(input("请输入一个整数（1-1000）："))
        if guess > target:
            print("猜大了")
        elif guess < target:
            print("猜小了")
        else:
            print("猜对了")
            
    except ValueError:
        print("输入内容必须为整数！")