def welcome():
print('欢迎来到单位转换器!'.center(40,'-'))
print('请参照以下样例进行输入:温度转换:45C, 5F, 长度转换:4foot, 1m, 货币转换:1RMB, 1D')
class Temperature:
"""温度转换"""
def __init__(self, start):
self.start = start
def c_to_f(self):
"摄氏度转华氏度"
t = self.start.strip('C')
t1 = ( 9 / 5 ) * t + 32
print(f'华氏温度为{t1}F')
def f_to_c(self):
"华氏度转摄氏度"
t = self.start.strip('F')
t2 = ( 5 / 9 ) * t - 32
print(f'摄氏温度为{t2}C')
class Length:
"""长度转换"""
def __init__(self, start):
self.start = start
def m_to_ft(self):
"米转英尺"
l = self.start.strip('m')
l1 = l * 3.2808399
print(f'长度为{l1}feet')
def ft_to_m(self):
"英尺转米"
l = self.start.strip('m')
l2 = l * 0.3048
print(f'长度为{l2}meters')
class Currency:
"""货币转换"""
def __init__(self, start):
self.start = start
def r_to_d(self):
"人民币转美金"
c = self.start.strip('RMB')
c1 = c * 0.1404
print(f'共{c1}dollors')
def d_to_r(self):
"美金转人民币"
c = self.start.strip('D')
c2 = c * 7.1218
print(f'共{c2}rmb')
class Transfer:
"""单位转换的输入输出"""
def __init__(self, start):
self.start = start
def transfer(self):
"""各种转换"""
try:
if self.start.strip().endswith('C') and self.start[:-1].isdigit():
return Temperature(self.start).c_to_f
elif self.start.strip().endswith('F') and self.start[:-1].isdigit():
return Temperature(self.start).f_to_c
elif self.start.strip().endswith('M') and self.start[:-1].isdigit():
return Length(self.start).m_to_ft
elif self.start.strip().endswith('foot') and self.start[:-1].isdigit():
return Length(self.start).ft_to_m
elif self.start.strip().endswith('RMB') and self.start[:-1].isdigit():
return Currency(self.start).r_to_d
elif self.start.strip().endswith('D') and self.start[:-1].isdigit():
return Currency(self.start).d_to_r
elif self.start.strip() == 'q':
return 'q'
except Exception as e:
print('输入格式错误,请重新输入', e)
def main():
welcome()
state = input('请按照要求输入:')
while True:
if Transfer(state).transfer() == 'q':
print('退出单位转换器')
break
else:
Transfer(state).transfer()
if __name__ == "__main__":
pass
我想写一个单位转化器,有输入,为什么这个程序跑不出来