※python学习第三天※

※python学习第三天※

目录

1、英制单位英寸和公制单位厘米互换

2、百分制成绩转等级制成绩

3、分段函数求值

4、掷骰子决定做什么事情

5、输入月收入和五险一金计算个人所得税

6、判断输入边长能否构成三角形（能则算三角形的周长和面积）

7、用户身份验证

1、英制单位英寸和公制单位厘米互换

value = float(input('请输入长度: '))
unit = input('请输入单位: ')
if unit == 'in' or unit == '英寸':print('%f英寸 = %f厘米' % (value, value * 2.54))
elif unit == 'cm' or unit == '厘米':print('%f厘米 = %f英寸' % (value, value / 2.54))
else:print('请输入有效的单位')

2、百分制成绩转等级制成绩

#90分以上 --> A
#80分~89分 --> B
#70分~79分 --> C
#60分~69分 --> D
#60分以下 --> Escore = float(input('请输入成绩: '))
if score >= 90:grade = 'A'
elif score >= 80:grade = 'B'
elif score >= 70:grade = 'C'
elif score >= 60:grade = 'D'
else:grade = 'E'
print('对应的等级是:', grade)

3、分段函数求值

x = float(input('x = '))
if x > 1:y = 3 * x - 5
elif x >= -1:y = x + 2
else:y = 5 * x + 3
print('f(%.2f) = %.2f' % (x, y))

4、掷骰子决定做什么事情

from random import randintface = randint(1, 6)
if face == 1:result = '唱首歌'
elif face == 2:result = '跳个舞'
elif face == 3:result = '学狗叫'
elif face == 4:result = '做俯卧撑'
elif face == 5:result = '念绕口令'
else:result = '讲冷笑话'
print(result)

5、输入月收入和五险一金计算个人所得税

salary = float(input('本月收入: '))
insurance = float(input('五险一金: '))
diff = salary - insurance - 3500
if diff <= 0:rate = 0deduction = 0
elif diff < 1500:rate = 0.03deduction = 0
elif diff < 4500:rate = 0.1deduction = 105
elif diff < 9000:rate = 0.2deduction = 555
elif diff < 35000:rate = 0.25deduction = 1005
elif diff < 55000:rate = 0.3deduction = 2755
elif diff < 80000:rate = 0.35deduction = 5505
else:rate = 0.45deduction = 13505
tax = abs(diff * rate - deduction)
print('个人所得税: ￥%.2f元' % tax)
print('实际到手收入: ￥%.2f元' % (diff + 3500 - tax))

6、判断输入边长能否构成三角形（能则算三角形的周长和面积）

import matha = float(input('a = '))
b = float(input('b = '))
c = float(input('c = '))
if a + b > c and a + c > b and b + c > a:print('周长: %f' % (a + b + c))p = (a + b + c) / 2area = math.sqrt(p * (p - a) * (p - b) * (p - c))print('面积: %f' % (area))
else:print('不能构成三角形')

7、用户身份验证

# import getpass
# from getpass import getpass
# from getpass import *username = input('请输入用户名: ')
password = input('请输入口令: ')
# 输入口令的时候终端中没有回显
# password = pass('请输入口令: ')
if username == 'admin' and password == '123456':print('身份验证成功!')
else:print('身份验证失败!')

我是花花，祝自己也祝您变强了~