Python中的总计问题 [英] Problem in totaling in Python

问题描述

我正在使用python 2.7.13。我必须制作一个输入产品类型的程序，然后总计所有输入产品的数量。我尝试制作一个，但它不起作用。

共有5种类型的产品可以输入。这是他们的名字和价格

bun 0.50

咖啡1.20

蛋糕1.50

三明治2.10

甜点4.00



我尝试过：

I am using python 2.7.13. I had to make a program that inputs a product type and then totals the amount for all the products entered. I tried making one but it isn't working.
there are total 5 types of products that can be entered. Here are their names and prices
bun 0.50
coffee 1.20
cake 1.50
sandwich 2.10
dessert 4.00

What I have tried:

while True:
    item = str(input("Which item would you like to buy?"))
    elif item == 'bun':
        abun = abun + 0.50
        nbun += 1
        continue
    elif item == 'coffee':
        acoffee = acoffee + 1.20
        ncoffee += 1
        continue
    elif item == 'cake':
        acake = acake + 1.50
        ncake += 1
        continue
    elif item == 'sandwich':
        asandwich = asandwich + 2.10
        nsandwich += 1
        continue
    elif item == 'dessert':
        adessert = adessert + 4.00
        ndessert += 1
        continue
    user_input = raw_input('type yes to continue and end to terminate:')
    if user_input == 'end':
        break
    total = abun + acoffee + acake + asandwich + adessert

推荐答案

嗨试试这个

我假设你要把所有变量都归零

Hi try this
I assume you are initailising all variables to zero

abun = 0
acoffee=0
acake=0
asandwich=0
adessert=0
nbun=0
ncake=0
ncoffee=0
nsandwich=0
ndessert=0



while True:
    item = raw_input("Which item would you like to buy?")
    if item == 'bun':
        abun = abun + 0.50
        nbun += 1
    elif item == 'coffee':
        acoffee = acoffee + 1.20
        ncoffee += 1
    elif item == 'cake':
        acake = acake + 1.50
        ncake += 1
    elif item == 'sandwich':
        asandwich = asandwich + 2.10
        nsandwich += 1
    elif item == 'dessert':
        adessert = adessert + 4.00
        ndessert += 1
    user_input = raw_input('type yes to continue and end to terminate:')
    if user_input == 'end':
        break
total = abun + acoffee + acake + asandwich + adessert

修复了上面的解决方案总数必须在while循环之外

fixed the solution above total has to be outside the while loop

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