简单的计算器函数返回0而不是操作（例如质量*加速度）

Question

userchoice = raw_input('What do you want to calculate?\nmass, acceleration or force')

def calculator():
    if userchoice == 'mass':
        acceleration = int(raw_input('What will be the acceleration?'))
        force = int(raw_input('And what it will be the force?'))
        return force / acceleration

    elif userchoice == 'force':
        acceleration = int(raw_input('What will be the acceleration?'))
        mass = int(raw_input('And what it will be the mass?'))
        return mass * acceleration

    elif userchoice == 'acceleration':
        force = int(raw_input('And what it will be the force?'))
        mass = int(raw_input('And what it will be the mass?'))
        return force/mass

    else:
        return "You didn't choose any of the available options"


print calculator()

在我运行任何流程后，我得到0而不是操作。 采取以下流程：用户选择质量，他输入20的加速度和2的力。结果应该是10，但我得到0。

Answer 1

除法输出默认转换为int。使用float()方法，如下所示：

userchoice = raw_input('What do you want to calculate?\nmass, acceleration or force')

def calculator():
    if userchoice == 'mass':
        acceleration = int(raw_input('What will be the acceleration?'))
        force = int(raw_input('And what it will be the force?'))
        return float(force) / float(acceleration)

    elif userchoice == 'force':
        acceleration = int(raw_input('What will be the acceleration?'))
        mass = int(raw_input('And what it will be the mass?'))
        return float(mass) * float(acceleration)

    elif userchoice == 'acceleration':
        force = int(raw_input('And what it will be the force?'))
        mass = int(raw_input('And what it will be the mass?'))
        return float(force)/float(mass)

    else:
        return "You didn't choose any of the available options"


print calculator()

它会正常工作：

>>> ================================ RESTART ================================
>>> 
>>> 
What do you want to calculate?
mass, acceleration or forcemass
What will be the acceleration?3
And what it will be the force?5
1.66666666667

Answer 2

我发现了问题......我想当我给予加速度20和力2时，我应该得到10，因为操作将是加速度/力，但它实际上是力/加速度......