Question

好的，所以我在主要调用4函数时遇到了一些问题。我一直坐在这里一个多小时，无法理解。

我继续收到此错误：

(total) = total(num, num2) UnboundLocalError: local variable 'total' referenced before assignment

def main():

    num = float(input(" Enter a number: "))
    num2 = float(input(" Enter another number: "))

    (total) = total(num, num2)
    (diff) = difference(num, num2)
    (product) = product(num, num2)
    (quot) = quotient(num, num2)

    print(" The total is: ", format(total, ".1f"), sep="")
    print(" The difference is: ", format(diff, ".1f"), sep="")
    print(" The product is: ", format(product, ".2f"), sep="")
    print(" The quotient is: ", format(quot, ".2f"), sep="")

def total(num, num2):
    total = (num + num2)
    return(total)


def difference(num, num2):
    diff = abs(num - num2)
    return(diff)


def product(num, num2):
    product = num * num2
    return(product)


def quotient(num, num2):
    quot = num / num2
    return(quot)

main()

Answer 1

您的函数描述了您要执行的操作，如果您甚至不使用它们，则没有理由在函数中创建局部变量。

def total(num, num2):
    return num+num2

def difference(num, num2):
    return abs(num - num2)

def product(num, num2):
    return num*num2

def quotient(num, num2):
    return num/num2

def main():
    num = float(input(" Enter a number: "))
    num2 = float(input(" Enter another number: "))

    summa = total(num, num2) #try to not use the same name for a variable and a function
    diff = difference(num, num2)
    prod = product(num, num2)
    quot = quotient(num, num2)

    print(" The total is: ", format(summa, ".1f"), sep="")
    print(" The difference is: ", format(diff, ".1f"), sep="")
    print(" The product is: ", format(prod, ".2f"), sep="")
    print(" The quotient is: ", format(quot, ".2f"), sep="")

main()

将多个功能调用到主要问题

1 个答案: