day05

1. 输入姑娘的年龄后，进行以下判断：

   1. 如果姑娘小于18岁，打印“不接受未成年”

   2. 如果姑娘大于18岁小于25岁，打印“心动表白”

   3. 如果姑娘大于25岁小于45岁，打印“阿姨好”

   4. 如果姑娘大于45岁，打印“奶奶好”

      girl_gender = input('Please input your gender:')
      if girl_gender == 'female':
          girl_age = int(input('Please input your age :'))
          if girl_age < 18 :
              print('不接受未成年')
          elif girl_age >= 18 and girl_age <=25:
              print('心动表白')
          elif girl_age > 25 and girl_age <= 45:
              print('阿姨好')
          else:
              print('奶奶好')
      else:
          print('输入错误，再见')
      

2. 预习while循环，打印1-100之间的奇数和

   count = 1
   sum_count = 0
   while count < 100:
       sum_count += count
       count += 2
   print(sum_count)
   

3. 预习while循环，猜年龄游戏升级版，有以下三点要求：

   1. 允许用户最多尝试3次
   2. 每尝试3次后，如果还没猜对，就问用户是否还想继续玩，如果回答Y或y， 就继续让其猜3次，以此往复，如果回答N或n，就退出程序
   3. 如果猜对了，就直接退出

age = 18
count = 0
while count <4:
   in_age = int(input('please input the age :'))
   if in_age == age:
       print('you are right')
       break
   elif in_age < age:
       print('猜小了')
   elif in_age > age:
       print('猜大了')
   count += 1
   count1 = 3 - count
   print('你还有%s次机会'%(count1))
   if count == 3:
       again = input('还想玩吗？想玩请输入Y，退出请输入N:')
       if again == 'Y':
           count = 0
       else:
           print('再见')
           break

4. 题目：企业发放的奖金根据利润提成。利润(I)低于或等于10万元时，奖金可提10%；利润高于10万元，低于20万元时，低于10万元的部分按10%提成，高于10万元的部分，可提成7.5%；20万到40万之间时，高于20万元的部分，可提成5%；高于40万元的部分，可提成3%。从键盘输入当月利润，求应发放奖金总数？

award = 0
profit = float(input('Please input the total profit（单位：万）:'))
if profit <= 10:
    award = profit*0.1
elif profit > 10 and profit <= 20:
    award = (profit-10)*0.075+1
elif profit > 20 and profit <= 40:
    award = (profit-20)*0.05+1+0.75
elif profit >40:
    award = (profit-40)*0.03+1+0.75+1
print(award)

5. 快递运费首重6元，超过则加收3元/kg(首重为1kg，不满则按1kg计算)，要求输入货物重量，计算运费

pay = 0
weight = float(input('请输入货物重量（KG）:'))
if weight <= 1:
    pay = 6
elif weight >1:
    weight1 = int(weight)
    print(weight1)
    if weight-weight1>0:
        pay = weight1*3+6
    else :
        pay = (weight1-1)*3+6
print(pay)

6. 输入税前工资数，计算出应交的个人所得税（不考虑税费减免政策）

   salary = float(input('请输入你的工资:'))
   tax = 0
   if salary  <=5000:
       tax = 0
   elif salary > 5000 and salary <= 8000:
       tax = (salary - 5000)*0.03
   elif salary > 8000 and salary <= 17000:
       tax = (salary-8000)*0.1+90
   elif salary > 17000 and salary <= 30000:
       tax = (salary-17000)*0.2+90+900
   elif salary > 30000 and salary <= 40000:
       tax = (salary-30000)*0.25+90+900+2600
   elif salary > 40000 and salary <= 60000:
       tax = (salary-40000)*0.3+90+900+2600+2500
   elif salary > 60000 and salary <= 85000:
       tax = (salary-60000)*0.35+90+900+2600+2500+6000
   elif salary > 85000:
       tax = (salary-85000)*0.45+90+900+2500+2600+6000+15000*0.35
   print('你应交的个人所得税为：%s'%(tax))
   

7. 一个球从100米高度自由落下，每次落地后弹回原来高度的一半，求它在第10次落地时，离地多高，共经过多少米？

   high1 = 100
   n = 1
   sum_high = 0
   while n<=9 :
       sum_high += high1
       high1 = high1/2
       n+=1
   print('sum_high:%s'%(sum_high))
   print(high1)
   

8. 有一个分数数列，1/2,2/3,4/4,8/5,16/6...，求前10项的和

     ```python
     sum_count  = 0
     n = 1
     while n<=10:
         sum_count1 = (n**2)/(n+1)
         sum_count +=sum_count1
         n+=1
     print(sum_count)
     ```
   

9. 猴子吃桃问题：猴子第一天摘下若干个桃子，当即吃了一半，第二天早上又将剩下的桃子吃掉一半。以后每天早上都吃前一天剩下的一半。到第10天早上想再吃时，见只剩下一个桃子了。求第一天共摘多少个桃子

    ```python
    n = 1
    i=1
    while n<= 9:
        i = 2*i
        n+=1
    print(i)
    
    ```