Question

prices=print("Mushroom Pies:£1.20     Vegtable Pies:£0.80     Spiced Lentil Pies:£1.40")
vegetablepies=0.80
mushroompies=1.20
spicedpies=1.40
total=vegetablepies+mushroompies+spicedpies
vegetablepies=input("How many vegtable pies do you want?")
mushroompies=input("How many mushroom pies do you want?")
spicedpies=input("How many spiced lentil pies do you want?")
print(total)

这是我的代码，我已经对其进行了一段时间的工作，但是这一部分不起作用，我不确定为什么数学不起作用

Answer 1

您的代码顺序是向后的。您想先要求输入，然后再计算总数。在所有三个输入之后移动计算总和的行，如下所示：

vegetablepies=input("How many vegtable pies do you want?")
mushroompies=input("How many mushroom pies do you want?")
spicedpies=input("How many spiced lentil pies do you want?")
total=vegetablepies+mushroompies+spicedpies
print(total)

Answer 2

这看起来像您想要的：

prices = print('Mushroom Pies:£1.20     Vegtable Pies:£0.80     Spiced Lentil Pies:£1.40')

vegetablepies_price = 0.80
mushroompies_price = 1.20
spicedpies_price = 1.40

vegetablepies = input('How many vegetable pies do you want?')
mushroompies = input('How many mushroom pies do you want?')
spicedpies = input('How many spiced lentil pies do you want?')

total_pies = int(vegetablepies) + int(mushroompies) + int(spicedpies)
total_price = int(vegetablepies)*vegetablepies_price + int(mushroompies)*mushroompies_price + int(spicedpies)*spicedpies_price

print('Total Pies:',total_pies)
print('Total Cost: £{:.2f}'.format(total_price))

此代码将商品价格乘以商品数量，然后返回订单的总费用。为了加总用户输入的数字，您需要将它们从字符串转换为数字。我使用了int()，它将强制数字为整数（假设您不能点半个饼）。

我的食物订购系统中的数字加法运算不正确

2 个答案: