Question

def addition(number, number2, mathematic_assignment):
    sum_value = number + number2
    return f'The sum of {number} {mathematic_assignment} {number2} is {sum_value}'


def subtraction(number, number2, mathematic_assignment):
    subtract_value = number - number2
    return f'The subtraction of {number} {mathematic_assignment} {number2} is {subtract_value}'


def multiply(number, number2, mathematic_assignment):
    multiplied_value = number * number2
    return f'The result of multiplying {number} {mathematic_assignment} {number2} is {multiplied_value}'


def division(number, number2, mathematic_assignment):
    divided_value = number / number2
    return f'The division of {number} {mathematic_assignment} {number2} is {round(divided_value)}'


def run_program():
    print("Welcome to the base calculator")
    is_running = True
    while is_running:
        first_number = int(input('Please provide the first number: '))
        second_number = int(input('Please provide the second number: '))
        mathematic_assignment = input('Please provide mathematical preference: \n+\n-\n*\n/\n')
        if mathematic_assignment == '+':
            print(addition(first_number, second_number, mathematic_assignment))
        elif mathematic_assignment == '-':
            print(subtraction(first_number, second_number, mathematic_assignment))
        elif mathematic_assignment == '*':
            print(multiply(first_number, second_number, mathematic_assignment))
        elif mathematic_assignment == '/':
            print(division(first_number, second_number, mathematic_assignment))
        else:
            print('There can be an error in the output, you must only put in "+", "-", "*", "/"')

        choice = input("Press 'q' to quit or anything to go on: ")
        if choice == 'q':
            print('The program will now quit')enter code here
            is_running = False


if __name__ == '__main__':
    run_program()enter code here

以下代码是由函数组成的基本计算器的示例。然而，我一直在努力解决的问题是启动计算器，其中第一个数字是前一个结果，所以你只能得到第二个数字和所需的数学运算（所以如果 5+5 是 10，那么下次运行代码时（使用 while 循环）现在第一个数字是 10 + {another number}）。

如您所见，除了以下挑战之外，一切就绪。我非常确定我可以在没有函数的情况下自己解决这个问题，但是我想知道函数是如何运行的并更详细地学习它们。我真的很感激答案

Answer 1

首先计算方法应该返回数值，以便您稍后使用它，我删除了参数ffmpeg -ss 00:06:51 -i truth.mp4 -c:a aac -c:v copy -t 8 true-30sec.mp4，因为每个方法都知道自己的

mathematic_assignment

然后在主代码中，你可以

保存每次调用的结果
询问是否使用先前的结果，如果存在（如果存在，您也可以不询问并自动使用它）

def addition(number, number2):
    sum_value = number + number2
    return sum_value, f'The sum of {number} + {number2} is {sum_value}'
def subtraction(number, number2):
    subtract_value = number - number2
    return subtract_value, f'The subtraction of {number} - {number2} is {subtract_value}'
def multiply(number, number2):
    multiplied_value = number * number2
    return multiplied_value, f'The result of multiplying {number} * {number2} is {multiplied_value}'
def division(number, number2):
    divided_value = number / number2
    return divided_value, f'The division of {number} / {number2} is {round(divided_value)}'

这是一个示例运行

def run_program():
    numeric_result = None
    print("Welcome to the base calculator")
    while True:
        result = None
        if numeric_result:
            first_number = input(
                f'Please provide the first number or empty to use the previous result ({numeric_result}):')
            first_number = int(first_number) if first_number else numeric_result
        else:
            first_number = int(input('Please provide the first number: '))

        second_number = int(input('Please provide the second number: '))
        mathematic_assignment = input('Please provide mathematical preference: + - * / : ')

        if mathematic_assignment == '+':
            result = addition(first_number, second_number)
        elif mathematic_assignment == '-':
            result = subtraction(first_number, second_number)
        elif mathematic_assignment == '*':
            result = multiply(first_number, second_number)
        elif mathematic_assignment == '/':
            result = division(first_number, second_number)
        else:
            print('There can be an error in the output, you must only put in "+", "-", "*", "/"')

        if result:
            numeric_result, str_result = result
            print(str_result)

        choice = input("Press 'q' to quit or anything to go on: ")
        if choice == 'q':
            print('The program will now quit')
            break

使用另一个函数中的变量的正确方法是什么？

1 个答案: