在python的while循环中合计变量

Question

我的计划是一个虚拟的麦当劳。一切正常，但我需要一个总体方法的帮助。在这个计划的底部，我合计了总费用等。现在我需要合计多少客户通过该计划。这很难，因为客户没有固定的号码。这个程序在while循环上运行，客户的总数完全取决于用户。如何计算客户总数？在

num1 = 4.87
num2 = 5.03
num3 = 5.50
num4 = 9.45
num5 = 1.29
num6 = 2.19
num7 = 2.29
tax = 0.0565
customer = 0
nextcustomer = "yes"
dailytax = 0
dailysubtotal = 0
dailyfinalbill = 0
dailynum_customers = 0

while nextcustomer != "no":
    amtgiven = 0
    change = 0
    quantity = 0
    foodprice = 0
    totalprice = 0
    billtax = 0
    finalbill = 0
    itemnum = 0
    print "Welcome to Virtual McDonald's!"
    print "Item:                     Meal/item:                          Price:"
    print "1                          Big Mac Meal                        4.87"
    print "2                          Quarter Pounder Meal                5.03"
    print "3                          Chicken Nuggets Meal (5 piece)      5.50"
    print "4                          ChickenNuggets Meal (10 piece)      9.45"
    print "5                          Apple Pie                           1.29"
    print "6                          Large Drink                         2.19"
    print "7                          Large Fries                         2.29"

    customer = raw_input ("Would you like to order? (If not type no)")
    while customer != "no":

        while itemnum != -1: 
            itemnum = input("Enter the item you would like to purchase! ")
            if itemnum == -1:
                break
            quantity = input("How many of this item do you want? ")

            if itemnum == 1:
                foodprice = quantity * num1
                totalprice += foodprice

            elif itemnum == 2:
                foodprice = quantity * num2
                totalprice += foodprice

            elif itemnum == 3:
                foodprice = quantity * num3
                totalprice += foodprice

            elif itemnum == 4:
                foodprice = quantity * num4
                totalprice += foodprice

            elif itemnum == 5:
                foodprice = quantity * num5
                totalprice += foodprice

            elif itemnum == 6:
                foodprice = quantity * num6
                totalprice += foodprice

            elif itemnum == 7:
                foodprice = quantity * num7
                totalprice += foodprice

        billtax = totalprice * tax
        finalbill = totalprice + billtax        
        dailytax = dailytax + billtax
        dailysubtotal = dailysubtotal + totalprice
        dailyfinalbill = dailyfinalbill + finalbill

        print "Your total bill without tax is... ", round(totalprice,2)
        print "Your total tax is... ", round(billtax,2)
        print "Your final bill is... ", round(finalbill,2)
        amtgiven = input("How much do you want to pay with? ")
        change = amtgiven - finalbill
        print "Your change is... ", round(change,2)
        break
    nextcustomer = raw_input("Is there another customer? (yes or no) ") 

print "The total amount of sales without added tax recieved today is...",round(dailysubtotal,2)
print "The total amount of taxes received today is...",round(dailytax,2)
print "The total amount of sales with added tax recieved today is...",round(dailyfinalbill,2)
print dailynum_customers

Answer 1

将numCustomers = 0添加到顶部。在

同时，更改此项：

while nextcustomer != "no":
    amtgiven = 0

为此：

^{pr2}$

最后，添加以下内容：

print 'total customers:', numCustomers