week6.chapter4课后习题

# 4.1
target= 777
guess= 0
GuessTimes= 0
while guess!= target:
    guess=eval(input("请输入一个猜测的整数(1-1000):"))
    if guess>target:
        print("猜大了")
        GuessTimes=GuessTimes+1
    elif guess<target:
        print("猜小了")
        GuessTimes=GuessTimes+1
    else:
        GuessTimes=GuessTimes+1
        print(f"猜对了,且你的猜测次数一共为：{GuessTimes}")

# 4.2
a=input("请输入一行字符：")
letter=0
number=0
space=0
others=0
for s in a:
    if s.isalpha():
        letter+=1
    elif s.isspace():
        space+=1
    elif s.isdigit():
        number+=1
    else:
        others+=1
print(f"英文字符、数字字符、空格字符、其它字符分别共有：{letter},{number},{space},{others}个")

#4.3
a,b=int(eval(input("请输入两个整数(记得用逗号隔开,大在前,小在后): ")))
e=a
f=b
GCD,LCM=0,0
if a%b==0:
    GCD=b
    LCM=a
else:
    c=a%b
    while c!=0:
        a=b
        b=c
        c=a%b
    GCD=b
    LCM=(e*f)/GCD
print(f"两个整数的最大公约数和最小公倍数分别为：{GCD}、{LCM}")

#4.4
import random
k=random.randint(0,1000)
guess= 0
GuessTimes= 0
while guess!=k:
    guess=eval(input("请输入一个猜测的整数(1-1000):"))
    if guess>k:
        print("猜大了")
        GuessTimes=GuessTimes+1
    elif guess<k:
        print("猜小了")
        GuessTimes=GuessTimes+1
    else:
        GuessTimes=GuessTimes+1
        print(f"猜对了,且你的猜测次数一共为：{GuessTimes}")

#4.5
def hanshu():
    import random
    k=random.randint(0,1000)
    guess= 0
    GuessTimes= 0
    while guess!=k:
        try:
          guess=eval(input("请输入一个猜测的整数(1-1000):"))
          if guess>k:
              print("猜大了")
              GuessTimes=GuessTimes+1
          elif guess<k:
              print("猜小了")
              GuessTimes=GuessTimes+1
          else:
              GuessTimes=GuessTimes+1
              print(f"猜对了,且你的猜测次数一共为：{GuessTimes}")
        except :
           print("输入内容必须为整数！,请重新输入")
hanshu()

#4.6
year=eval(input("请输入一个年份："))
if (year%4==0 and year%100 !=0)or year%400==0:
    print(f"{year}为闰年")
else:
    print(f"{year}不是闰年")

#4.7
while 1:
    num=input("请输入一个全为数字的十进制整数： ")
    if num.isdigit():
        a=int(num)
        print(a)
        break
    else:
        print("输入不符合规定，请重新输入")
        

#4.8
while True:
    s = input("请输入小数：")
    if '.' in s and s.replace('.','',1).lstrip('-').isdigit(): break
    print("必须输入标准小数格式！")
print(f"您输入的是：{float(s)}")