【Python】第3次练习：if条件语句——水费计算、判断闰年、货币转换程序（双符号）

一、单选题：

二、程序题：

1、水费计算

w=eval(input())
if w<=10:
    x=w*0.32
    print('{:.1f}'.format(x))
if 10<w<=20:
    x=(w-10)*0.64+10*0.32
    print('{:.1f}'.format(x))
if w>20:
    x=(w-20)*0.96+10*0.64+10*0.32
    print('{:.1f}'.format(x))

2、判断闰年

y=eval(input())
if y%100!=0&y%4==0 or y%400==0:
    print('True')
else:
    print('False')

3、货币转换程序（双符号）

currency_string = input()
USD_rate=6.78
unit = currency_string[-1]

def convert_currency(money,exchange_rate):
    output = money * exchange_rate
    return output

if unit == 'D':
    exchange_rate = USD_rate
    money = eval(currency_string[:-3])
    x=money * exchange_rate
    a = '{:.2f}'.format(x)
    print(str(a)+'RMB')
if unit == '$':
    exchange_rate = USD_rate
    money2= eval(currency_string[:-1])
    x=money2 * exchange_rate
    a = '{:.2f}'.format(x)
    print(str(a)+'￥')
if unit == 'B':
    exchange_rate = 1/USD_rate
    money = eval(currency_string[:-3])
    x = money * exchange_rate
    a='{:.2f}'.format(x)
    print(str(a)+'USD')
if unit == '￥':
    exchange_rate = 1/USD_rate
    money2 = eval(currency_string[:-1])
    x = money2 * exchange_rate
    a='{:.2f}'.format(x)
    print(str(a)+'$')