Question

def load():    
    global name
    global count
    global shares
    global pp
    global sp
    global commission
    name=input("Enter stock name OR -999 to Quit: ")
    count =0
    while name != '-999':
        count=count+1
        shares=int(input("Enter number of shares: "))
        pp=float(input("Enter purchase price: "))
        sp=float(input("Enter selling price: "))
        commission=float(input("Enter commission: "))
        calc()
        display()
        name=input("\nEnter stock name OR -999 to Quit: ")

def calc():
    totalpr=0
    global amount_paid
    global amount_sold
    global profit_loss
    global commission_paid_sale
    global commission_paid_purchase
    global totalpr
    amount_paid=shares*pp
    commission_paid_purchase=amount_paid*commission
    amount_sold=shares*sp
    commission_paid_sale=amount_sold*commission
    profit_loss=(amount_sold - commission_paid_sale) -(amount_paid + commission_paid_purchase)
    totalpr=totalpr+profit_loss

def display():
    print("\nStock Name:", name)
    print("Amount paid for the stock:       $",      format(amount_paid, '10,.2f'))
    print("Commission paid on the purchase: $", format(commission_paid_purchase, '10,.2f'))
    print("Amount the stock sold for:       $", format(amount_sold, '10,.2f'))
    print("Commission paid on the sale:     $", format(commission_paid_sale, '10,.2f'))
    print("Profit (or loss if negative):    $", format(profit_loss, '10,.2f'))

def main():
    load()


main()

print("\nTotal Profit is $", format(totalpr, '10,.2f'))

最后一行代码表明了问题。 “totalpr”的显示不是例如3个输入股票的运行记录。这只是重述的利润损失。如果有人决定输入库存数据，我怎样才能准确显示运行总量？它的工作方式：有人输入'-999'的标记，然后程序将每个实例的所有profit_loss相加并打印出来。而已。

Answer 1

每次调用totalpr时，您都会重置calc。

def calc():
    totalpr=0  # resets to zero every time
    # ...
    totalpr=totalpr+profit_loss  # same as `totalpr = 0 + profit_loss`

相反，您必须在totalpr之外初始化calc：

totalpr = 0  # set to zero only once
def calc():
    # ...
    totalpr = totalpr + profit_loss  # same as `totalpr += profit_loss`

正在运行的总计无法正确打印

1 个答案: