Question

我是一名初学Python程序员，我正在创建一个卡路里计数器作为实验室。我要做的是在列表中取卡路里的整数值，然后乘以列表中数量的整数值。

代码可以在下面找到

我想要做的基本上是

calories = int((conv(carbs, "c") + conv(fats, "f") + conv(protein, "p") * qtyList[c]))

但是它说c没有定义（这是因为我没有在displayList函数中这样做，但我不知道如何在本地将c合并到addItem函数中，或者怎么做一开始就是这样。）

有关该计划的更多信息和问题，以及它需要做什么：

欢迎菜单
显示选项(a - add item, d - delete item, l - display list, q - quit)
当它是a时，接收字符串项目名称，int项目数量，转换为卡路里的int值，将卡路里作为int返回到全局变量，然后乘以数量*卡路里总项目卡路里
d - 通过列表中的位置从列表中删除项目
l - 显示列表..简单
q - 退出

我很想知道是否有人可以帮我解决这个问题，但不是整件事。感谢。

# New Lab 7

# define lists
itemList = []
qtyList = []
calsList = []
totalCal = 0

def conv(grams, kind):
    if kind == "f":
        return grams * 9
    else:
        return grams * 4

def dispMenu():
    print ("a - add item")
    print ("d - delete the item")
    print ("l - display the list so far")
    print ("q - quit")

def addItem():
    carbs = 0
    fats = 0
    protein = 0
    calories = 0
    item = input("Item name: ")
    if item.isspace() or len(item) == 0:
        print("item must have a proper name")
        return None  # get me outta here
    try:
        qty = int(input("quantity: "))
        if qty <= 0:
            print("quantity must be a positive number")
            return None
    except:
        print("That was not a valid integer.")
        return None
    carbs = int(input("How many grams of carbs are displayed on your item? "))
    fats = int(input("How many grams of fats are displayed on your item? "))
    protein = int(input("How many grams of protein are displayed on your item? "))
    global calories
    calories = int((conv(carbs, "c") + conv(fats, "f") + conv(protein, "p") * qtyList[c]))
    calsList.append(calories)
    itemList.append(item)
    qtyList.append(qty)
    print("Your item contains", calories, "calories.")
    global totalCal
    totalCal += calories
    return totalCal

def dispList():
    if len(itemList) == 0:
        print("\nThere are no items in your list\n")
    else:

        print("\n\n\nThe items in your list are")
        print("Itm\tItem\t\tQty\tCals")

        totalQty = int(0)
        for c in range(len(itemList)):
            print(str(c+1)+".\t" + itemList[c], "\t", qtyList[c])
            totalQty += qtyList[c]

        print("Total calories:\t{}".format(totalCal) + ".\n\n\n")



def delItem():
    if len(itemList) == 0:
        print("\nThere are no items in your list to delete\n")
    else:
        print("Please choose the item number to delete")
        dispList()
        choice = int(input("Delete item > "))

        if 1 <= choice <= len(itemList):
            del itemList[choice - 1]
            del qtyList[choice - 1]
            print("Item Deleted")
            dispList()
        else:
            print("\nThe value is out of range\n")




# start the program
print("Welcome to Clinton's Calorie Counter!")
dispMenu()
while True:

    choice = input("> ")

    if choice == "a":
        addItem()
        dispMenu()
        continue
    elif choice == "q":
        dispList()
        print("Goodbye!")
        break
    elif choice == "l":
        dispList()
        dispMenu()
        continue
    elif choice == "d":
        delItem()
        continue

Answer 1

使用(defun make-bar-from-foo (existing-foo c) (make-instance 'bar :a (a existing-foo) :b (b existing-foo) :c c))：

qty

您稍后将使用calories = int(conv(carbs, "c") + conv(fats, "f") + conv(protein, "p") * qty)填写您的列表：qty使用当前值应该有效。

Answer 2

我怀疑你的意思是：

$("#btnAdd").click(function () { 
  $("#example-advanced-form h3>fieldset").height(500); 
});

更重要的是，你的意思是：

calories = int((conv(carbs, "c") + conv(fats, "f") + conv(protein, "p") * qty))

其他方面，计算出的数字为：calories_per_item = int((conv(carbs, "c") + conv(fats, "f") + conv(protein, "p")) calories = calories_per_item * qty

即，使用您刚从用户请求的数量。稍后在代码中，您会将其附加到carbs + fats + (protein * quantity)。

试图在两个函数之间相乘？

2 个答案: