Question

我是Python的新手，并试图找出如何减去用户输入的数组中的数字。例如，在我的程序的早期，我有： `

peakone = raw_input("Where is the next large peak?: ")
next_peak.append(peakone)
peaktwo = raw_input("Where is the next large peak?: ")
next_peak.append(peaktwo)

现在我想从peaktwo中减去peakone并将此值保存为第三个。如果有的话，最好的方法是什么？

Answer 1

你可以这样做：

peakthree = float(peaktwo) - float(peakone)

您从raw_input获得的是一个字符串，因此您需要将其转换为数字类型，例如float或int。考虑编写这样的代码：

def get_next_peak():
    return float(raw_input("Where is the next large peak?: "))

next_peak = []
next_peak.append(get_next_peak())
next_peak.append(get_next_peak())
next_peak.append(next_peak[1] - next_peak[0])

Answer 2

将next_peak设为list

将输入转换为int或float

next_peak = []
peakone = raw_input("Where is the next large peak?: ")
next_peak.append(int(peakone))
peaktwo = raw_input("Where is the next large peak?: ")
next_peak.append(int(peaktwo))
print next_peak[0] - next_peak[1]

如果需要，可以将int更改为float

从输入的数组中减去数字

2 个答案: