def new_input():
    total = []
    while True:
        unit= input("请输入:")
        if unit=='q':
            break
        else:
            try:
                unit=int(unit)
            except:
                print("输入错误,请重新输入数字" ) 
            else:      
                total.append(unit)
            print('*'*20)
        return total

def sum(money):
    count=0
    for i in money:
        count=count+1
    return count


price=new_input()
pay=sum(price)
print("你一共消费了"+str(pay)+"元！扫码还是现金呢？")