我正在学习免费的在线 Python 教程,它希望我:
Create a temperature converter which will convert Fahrenheit values to Celsius and vice-versa using the following two formulas which relate the temperature f in Fahrenheit to the temperature c in Celsius:
f = c * 9/5 + 32 c = (f -32)* 5/9
The input will be a string consisting of a floating-point number followed immediately by the letter
F
orC
, such as"13.2C"
. I need to convert to the other temperature scale and print the converted value in the same format. For example, if the input is "8F" then the output should be (approximately)"-13.333C"
, and if the input is"12.5C"
then the output should be"54.5F"
.
我的回答总是略有偏差。例如,当正确输出为 -16.394444444444442C
时,我得到 -16.444444444444446C
。我使用 float 的方式有问题吗?我的代码如下:
def celsiusCon(farenheit):
return (farenheit - 32)*(5/9)
def farenheitCon(celsius):
return ((celsius*(9/5)) + 32)
inputStr = input()
inputDig = float(inputStr[0:-2])
if inputStr[-1] == 'C':
celsius = inputDig
print(farenheitCon(celsius),'F',sep ='')
if inputStr[-1] == 'F':
farenheit = inputDig
print(celsiusCon(farenheit),'C', sep='')
最佳答案
您正在切断最后的两个 个字符,而不仅仅是最后一个:
inputDig = float(inputStr[0:-2])
应该是:
inputDig = float(inputStr[0:-1])
这说明了您的准确性问题:
>>> celsiusCon(2.4)
-16.444444444444446
>>> celsiusCon(2.49)
-16.394444444444446
由于切片从末尾开始计数,切片到 :-2
单位和最后一位的切割:
>>> '2.49F'[:-2]
'2.4'
>>> '2.49F'[:-1]
'2.49'
关于python - python的温度转换,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18780440/