.ceil()数学函数不起作用?

时间:2013-10-02 19:52:40

标签: python python-3.x

Python解释器说paintRequiredCeiling是未定义的。我无法在代码中找到任何错误。目标是让程序从用户那里获取输入,然后计算油漆作业所需的成本/小时数。

import math

def main():
    # Prompts user for sq and paint price
    totalArea = float(input("Total sq of space to be painted? "))
    paintPrice = float(input("Please enter the price per gallon of paint. "))

    perHour = 20
    hoursPer115 = 8

    calculate(totalArea, paintPrice, perHour, hoursPer115)
    printFunction()

def calculate(totalArea, paintPrice, perHour, hoursPer115):
    paintRequired = totalArea / 115
    paintRequiredCeiling = math.ceil(paintRequired)
    hoursRequired = paintRequired * 8
    costOfPaint = paintPrice * paintRequiredCeiling
    laborCharges = hoursRequired * perHour
    totalCost = laborCharges + costOfPaint

def printFunction():
    print("The numbers of gallons of paint required:", paintRequiredCeiling)
    print("The hours of labor required:", format(hoursRequired, '.1f'))
    print("The cost of the paint: $", format(costOfPaint, '.2f'), sep='')
    print("Total labor charges: $", format(laborCharges, '.2f'), sep='')
    print("Total cost of job: $", format(totalCost, '.2f'), sep='')

main()

2 个答案:

答案 0 :(得分:1)

变量paintRequiredCeiling仅在您的计算函数中可用。你printFunction中不存在它。与其他变量类似。您需要将它们移出函数之外,或者传递它们才能使它工作。

答案 1 :(得分:1)

return函数中没有calculate()语句:您正在计算所有这些值,然后在函数结束时抛弃它们,因为这些变量都是函数的本地变量。

同样,您的printFunction()函数不接受任何要打印的值。因此,它希望变量是全局变量,因为它们不是,所以你会得到错误。

现在你可以使用全局变量,但这通常是错误的解决方案。相反,请了解如何使用return语句返回calculate()函数的结果,将其存储在main()中的变量中,然后将其传递给printFunction()

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