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I have created a class called Calculator with the add, subtract, multiply and divide function. The calculator is limited to adding two numbers and returning the result.I am relatively new to OOP,would like to get some input on the class, did i take the long route and if i did is there another way to simplify the class.
Here is the code:
Clay6 Answers
IMHO, you should use Polymorphism.
This Video may help you understanding this principle
Here's my way of thinking.
First, define an interface for any operations you'd need
Then, create the calculator holder
Then you can define an operation, for example, addition
And you would use it like :
With that point, if you want to add any new behaviour, or modify an existing one, just create or edit a class.
For example, say you want a Modulus operation
Then,
This solution allows your code to be a third-party library
If you plan to reuse this code or give it away as a library, the user wouldn't by any case modify your source code.
But what if he wants a Substraction or a BackwardSubstraction method which are not defined ?
He just has to create his very own Substraction class in his project, which implements OperationInterface in order to work with your library.
It's easier to read
When looking in the project architecture it's easier to see a folder like this
And immediatly know which file contains the desired behaviour.
ToukiToukiI don't think a plain calculator is a good example for OOP. An object needs both a set of methods and a set of variables that represent its state, and can be used to differentiate instances of the object. I would suggest trying to make 'moody' calculators. A calculator with a happy mood will add 2 to each result, and an angry calculator will subtract 2 from each result.
MattMattI would do something like this
This way you can easyly add new operations
And chain operations like this
AlfwedAlfwedInstall printer driver command line. In general, we don't fix value in those kind of class.Your methods should take their 2 values by arguments instead of picking private members.
Like the following:
Thus, Calculator becomes a tool, and we should not need to allocate this kind of object.That's why Calculators methods should be static.
In this way, all you need to call is Calculator::add(1, 2).You can find those kinds of class everywhere. Like Vector, Matrice in math or 3D. Or write to the output or anything like that.
Remember, it is a way to do that, neither the best nor the worst.
Simoneyou should probably end up doing something like
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Take a look at this example. You can give any number of arguments like this using func_num_args()
Andrei Cristian ProdanAndrei Cristian Prodan
This task has a lot of solutions, here is one of them:
Php Download Free
And here is nice solution https://gist.github.com/cangelis/1442951