Question

python新手 Windows 7 python 3.3.0 我无法弄清楚如何返回函数参数值。一直在四处寻找疯狂这是一个课堂作业，但我确实有一个简单的脚本可以上交，但是我的射击是为了推动我的自我。只是需要知道我是否走错了方向。感谢

def main():
    seat_a = 15.00
    seat_b = 12.00
    seat_c = 9.00
    class_a(seat_a)
    class_b(seat_b)
    class_c(seat_c)
    set_a = class_a(ticket_a)
    set_b = class_b(ticket_b)
    set_c = class_b(ticket_c)
    result_a_b_c =  set_a + set_b + set_c
    print("The total income generated from all ticket sales is $ ", format(result_a_b_c,',.2f'))

def class_a(ticket_a):
    while True:
        try:
            ask_a = float(input("How many class A seat tickets were sold? "))
            total_a = ticket_a * (ask_a)
            break
        except ValueError:
            print("That is not a valid number. Please try again.")
            class_a(ticket_a)
            break
        total_a = class_a(ticket_a)

def class_b(ticket_b):
    while True:
        try:
            ask_b = float(input("How many class B seat tickets were sold? "))
            total_b = ticket_b * (ask_b)
            break
        except ValueError:
            print("That is not a valid number. Please try again.")
            class_b(ticket_b)
            total_b = class_b(ticket_b)
            break

def class_c(ticket_c):
    while True:
        try:
            ask_c = float(input("How many class C seat tickets were sold? "))
            total_c = ticket_c * ask_c
            break
        except ValueError:
            print("That is not a valid number. Please try again.")
            class_c(ticket_c)
            total_c = class_c(ticket_c)
            break

main()

Answer 1

首先，您的功能不会返回任何内容。查看添加return语句以传回值。 Here is a fairly simple introduction to functions

其次，如果函数确实返回了一个值，你想将它分配给一个变量，你的代码只是调用函数而没有赋值。

例如，这个小程序将一个整数传递给一个函数，然后将它加倍并返回新值，然后打印出来。

def double(x):
    y = x * 2
    return y

z = double(2)
print(z)

无法弄清楚如何返回函数参数值

1 个答案: