Question

##---Initializing Variable----------------------------------------------------------------------#
#-----------------------------------------------------------------------------------------------#
monthlyIncome=0
monthlyExpenses=0
totalExpenses=0

##---Introductory Statement: Welcome to the Program---------------------------------------------#
#-----------------------------------------------------------------------------------------------#
def intro():
    print("\n".join(["---------------------------------------------------------",
              "Hello and Welcome to the Budget Analyzer",
              "Get ready to find out how much money you'll have left $$$",
              "---------------------------------------------------------"]))
    return

##---The monthlyIncome mod. gets user input for income/mth to compare against expenses----------#
#-----------------------------------------------------------------------------------------------#
def getIncome(): 
    monthlyIncome=float(input("Please enter the amount of money you'll have for the month: "))
    return monthlyIncome

编辑：我能够让它完成循环，但现在代码一直在询问“输入费用”，无论按下哪个按钮。

如果需要完整代码，请预先输入以下代码序列：

#---Run main module-----------------------------------------------------------------------------#
def main():
    intro()
    getIncome()
    getExpenses(monthlyIncome)

这是主要模块 - 我仍在尝试调试问题所在，所以我还没有完成部分程序：

cairo_pdf

Answer 1

您的代码有效，但可能不符合您的预期：

def getExpenses():
    userExpense = 0
    totalExpenses = 0
    moreExpenses = ""
    while moreExpenses != "y":
        userExpense = float(input("Enter an expense: "))
        totalExpenses = totalExpenses + userExpense
        moreExpenses = input("Do you have more expenses? Type y" +\
                             " to input more expenses, or any key for no: ")

    return totalExpenses

要停止循环，请按＆＃34; y＆＃34;。

就此而言，它完全符合它在锡上的说法。但是，这有点不合逻辑：

系统会提示您问题＆＃34; do you have more expenses＆＃34;

如果您回答＆＃34; y＆＃34; （=是）它会停止...因此您应该将!=更改为=并在循环前将moreExpenses变量预设为y：

def getExpenses():
    userExpense = 0
    totalExpenses = 0
    moreExpenses = "y"
    while moreExpenses == "y":
        userExpense = float(input("Enter an expense: "))
        totalExpenses = totalExpenses + userExpense
        moreExpenses = input("Do you have more expenses? Type y" +\
                             " to input more expenses, or any key for no: ")

    return totalExpenses

Python 3+：即使用户输入按钮停止循环，循环仍继续要求用户输入费用。

1 个答案: