Question

因此，我需要计算用户每月花费的金额，然后使用该数字来计算他们每年花费的金额。为了做到这一点，我想将他们的每月费用乘以12以获得他们的年度费用，但我一直到达同样的错误，我不能将int和函数与运算符相乘＆＃34; *＆＃34;

def loan_payment():
    loan = float(input("Please enter how much you expend monthly on loan payments:"))
    return loan
def insurance_cost():
    insurance = float(input("Please enter how much you expend monthly on insurance:"))
    return insurance
def gas_cost():
    gas = float(input("Please enter how much you expend monthly on gas:"))
    return gas
def maitanence_cost():
    maitanence = float(input("Please enter how much you expend monthly on maintanence:"))
    return maitanence
def monthly_cost():
    monthly_expenses = float(loan + insurance + gas + maintanence)
    return float(monthly_expenses)
    print("You expend $"+format(monthly_cost, '.2f')+"in a month.")
def yearly_cost():
    yearly_expenses = 12 * monthly_cost
    return yearly_expenses
    print("At your current monthly expenses, in a year you will have paid $"+format(yearly_cost, '.2f')+".")
def main():
    loan_payment()
    insurance_cost()
    gas_cost()
    maitanence_cost()
    monthly_cost
    yearly_cost()
main()

Answer 1

在我看来，你正在学习如何使用功能。

def loan_payment():
    loan = float(input("Please enter how much you expend monthly on loan payments:"))
    return loan
def insurance_cost():
    insurance = float(input("Please enter how much you expend monthly on insurance:"))
    return insurance
def gas_cost():
    gas = float(input("Please enter how much you expend monthly on gas:"))
    return gas
def maitanence_cost():
    maitanence = float(input("Please enter how much you expend monthly on maintanence:"))
    return maitanence
def monthly_cost(loan, insurance, gas, maitanence):
    monthly_expenses = float(loan + insurance + gas + maitanence)

    print("You expend $"+format(monthly_expenses, '.2f')+"in a month.")
    return float(monthly_expenses)
def yearly_cost(monthly_cost):
    yearly_expenses = 12 * monthly_cost

    print("At your current monthly expenses, in a year you will have paid $".format(yearly_expenses, '.2f') + ".")
    return yearly_expenses

loan = loan_payment()
insurance = insurance_cost()
gas = gas_cost()
maitanence = maitanence_cost()

monthly_cost = monthly_cost(loan, insurance, gas, maitanence)

yearly_cost(monthly_cost)

是你想要的。

无论您使用return语句返回什么，我都会将其分配给变量。所以一旦我收集了它们，我就可以在收集4个变量的monthly_cost()函数中传递它们。

此外，仅当您要退出该功能时才return。如果print在return语句到达之前，则不会执行print语句。我希望所有这一切都有道理。 w ^

了解return的工作原理！

Answer 2

您忘记了括号来调用该函数：

yearly_expenses = 12 * monthly_cost()

然后您有无法访问的代码：无法访问最后一行print...。

def monthly_cost():
    monthly_expenses = float(loan + insurance + gas + maintanence)
    return float(monthly_expenses)
    print("You expend $"+format(monthly_cost, '.2f')+"in a month.")

如何将函数乘以整数？

2 个答案: