Chapter 20. Constructors and Destructors
FAQ 20.01 What is the purpose of a constructor?
The constructor turns a pile of incoherent, arbitrary bits into a living object. It initializes the object's internal data members, but it may also allocate resources (memory, files, semaphores, sockets, and so on). The word “ctor” is shorthand for the word “constructor.”
The constructors for class X are member functions named X. Here is an example.
There can be more than one constructor for a class. Each constructor has the same name, so the compiler uses their signatures to uniquely identify them.
FAQ 20.02 What is C++'s constructor discipline?
A constructor ...
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