调试一个简单的Python price-cod

Question

我用Python编写了这段代码

def receipt(array):
  sum = 0.0
  for i in range(len(array)):
    sum = sum + array[i]
  return sum

array = []

while True:
  print("Calculating Price")
  n = input("Enter a price: ")
  if n == "":
    print("Goodbye")
    break
  array.append(n)
  totalCost = receipt(n)
  print("The total cost is " + str(totalCost))

我想知道为什么这个代码不起作用。第四行似乎有点错误

^{pr2}$

但我不知道哪一部分是错的。我相信我正确地使用了数组[I]组件。也许这是一个字符串的问题？在

Question:

1. 代码的哪一部分不起作用？在
2. 我的错误是什么？在

一般来说，我对计算机科学比较陌生。谢谢你的帮助。什么都值得感激！在

Answer 1

你有什么问题，我会一一点评：

首先，你有一些压痕问题，小心点。 其余的是代码中的注释

update

def receipt(array):
  sum = 0.0
  for i in range(len(array)):
    sum = sum + array[i]
  return sum
array = []
while True:
  print("Calculating Price")
  n = input("Enter a price: ") #If you convert the str into float here it will cause an error in the if
  if n == "": #here, when you hit enter, it sends the "" (empty string)
    print("Goodbye")
    break
  array.append(float(n)) #So an option is transform the string here
  totalCost = receipt(array) #and here, you gave to receipt() function the wrong param, you gave "n" and it was waiting for an array 
  print("The total cost is " + str(totalCost))