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I think this is a pretty simple question, but I can't seem to find a good answer for it by googling.
While programming in C++ (as a beginner), I often like to organize my code using classes. But is there a reason to not create a class when I will only need one object for that class? When I learned about object oriented programming, I understood that classes are a way to describe certain objects when you need many of them.
I guess my question is simply: Is it common to create a class if only one object is needed of that class?
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In object-oriented programming, a singleton class is a class that can have only one object (an instance of the class) at a time. After the first time, if we try to instantiate the Singleton class, the new variable also points to the first instance created.
Which of the following class allows to declare only one object of it? Explanation: Singleton class allows the programmer to declare only one object of it, If one tries to declare more than one object the program results into error.
The only way to retrieve an instance of the Singleton object for this class is to call the getInstance() method which insures that there will always be one instance of the Singleton object.
No, the singleton pattern is for restricting the code to make it impossible to create additional objects. If you will ever just need one object of the class, just create that one. There is no need to add extra complexity if you don' t have a problem to solve (like accidentally creating multiple copies).
Even if you only need to instantiate an object of a class once, it is beneficial to create a class header file with its own variables and functions rather than defining them in main. Creating a class reinforces the concept of encapsulation, which makes the code more easily maintainable (you can reuse the class and/or update the functionality). Moreover, creating a class will keep the format consistent and make the code easy to read when you re-read it or invite someone to look over your program.
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