销售佣金程序使用while循环。 值未更新

Question

我的while循环没有在我运行程序时更新我的​​新销售佣金程序。 这是我的程序：

 #this program calculates sales commissions and sums the total of all sales commissions the user has entered

print("Welcom to the program sales commission loop")

keep_going='y'

while keep_going=='y':

    #get a salespersons sales and commission rate
    sales=float(input('Enter the amount of sales'))
    comm_rate=float(input('Enter commission rate'))

    total=0

    #calculate the commission
    commission=sales*comm_rate



    print("commission is",commission)



    keep_going=input('Enter y for yes')

    total=total+commission
    print("Total is",total)

print("You have exited the program. Thet total is",total)

程序的输出如下：Python 3.5.2（v3.5.2：4def2a2901a5，2016年6月25日，22：01：18）在win32上的[MSC v.1900 32位（Intel）]键入“ copyright”，“ credits”或“ license（）”以获取更多信息。

Welcom to the program sales commission loop
Enter the amount of sales899
Enter commission rate.09
commission is 80.91
Enter y for yesy
Total is 80.91
Enter the amount of sales933
Enter commission rate.04
commission is 37.32
Enter y for yesy
Total is 37.32
Enter the amount of sales9909
Enter commission rate.10
commission is 990.9000000000001
Enter y for yesn
Total is 990.9000000000001
You have exited the program. Thet total is 990.9000000000001
>>> 

> Blockquote

我究竟做错了什么？ 我想不明白

Answer 1

每次循环时，您都将total设置为零。 如下所示，将total的初始化移到循环外部。

#this program calculates sales commissions and sums the total of all sales commissions the user has entered

print("Welcom to the program sales commission loop")

keep_going='y'

total=0
while keep_going=='y':

    #get a salespersons sales and commission rate
    sales=float(input('Enter the amount of sales'))
    comm_rate=float(input('Enter commission rate'))

    #calculate the commission
    commission=sales*comm_rate

    print("commission is",commission)

    keep_going=input('Enter y for yes')

    total=total+commission
    print("Total is",total)

print("You have exited the program. Thet total is",total)

Answer 2

问题在于，每次重复循环时，您都要重新初始化“总计”。 您无需初始化变量，但是如果需要，则必须在while循环之外进行。 更正后的代码将是：

#this program calculates sales commissions and sums the total of all sales commissions the user has entered

print("Welcome to the program sales commission loop")

keep_going='y'
total=0
while keep_going=='y':
    #get a salespersons sales and commission rate
    sales=float(input( 'Enter the amount of sales ' ))
    comm_rate=float(input( 'Enter commission rate ' ))

    #calculate the commission
    comission= sales * comm_rate
    print( "commission is {}".format(comission) )

    keep_going=input('Enter y for yes: ')
    total += comission
    print( "Total is {}".format(total) )

print("You have exited the program. Thet total is",total)