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  2. C++ classes - Wikipedia

    en.wikipedia.org/wiki/C++_classes

    A class in C++ is a user-defined type or data structure declared with any of the keywords class, struct or union (the first two are collectively referred to as non-union classes) that has data and functions (also called member variables and member functions) as its members whose access is governed by the three access specifiers private, protected or public.

  3. Access modifiers - Wikipedia

    en.wikipedia.org/wiki/Access_modifiers

    C++ uses the three modifiers called public, protected, and private. [3] C# has the modifiers public, protected,internal, private, protected internal, private protected, and file. [4] Java has public, package, protected, and private; package is the default, used if no other access modifier keyword is specified. The meaning of these modifiers may ...

  4. Naming convention (programming) - Wikipedia

    en.wikipedia.org/wiki/Naming_convention...

    The choice of a variable name should be mnemonic — that is, designed to indicate to the casual observer the intent of its use. One-character variable names should be avoided except for temporary "throwaway" variables. Common names for temporary variables are i, j, k, m, and n for integers; c, d, and e for characters. int i;

  5. Access level - Wikipedia

    en.wikipedia.org/wiki/Access_level

    In C++, the only difference between a struct and a class is the default access level, which is private for classes and public for structs. [3] To illustrate the benefit: consider a public variable which can be accessed from any part of a program.

  6. Global variable - Wikipedia

    en.wikipedia.org/wiki/Global_variable

    In computer programming, a global variable is a variable with global scope, meaning that it is visible (hence accessible) throughout the program, unless shadowed.The set of all global variables is known as the global environment or global state.

  7. Environment variable - Wikipedia

    en.wikipedia.org/wiki/Environment_variable

    The %PUBLIC% variable (introduced with Vista) points to the Public (pseudo) user profile directory "C:\Users\Public". %ProgramFiles% , %ProgramFiles(x86)% , %ProgramW6432% The %ProgramFiles% variable points to the Program Files directory, which stores all the installed programs of Windows and others.

  8. Member variable - Wikipedia

    en.wikipedia.org/wiki/Member_variable

    /*Ruby has three member variable types: class, class instance, and instance. */ class Dog # The class variable is defined within the class body with two at-signs # and describes data about all Dogs *and* their derived Dog breeds (if any) @@sniffs = true end mutt = Dog. new mutt. class. sniffs #=> true class Poodle < Dog # The "class instance variable" is defined within the class body with a ...

  9. Class (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Class_(computer_programming)

    Class variableVariable defined in a class whose objects all possess the same copy; Instance variable – Member variable of a class that all its objects possess a copy of; List of object-oriented programming languages; Trait (computer programming) – Set of methods that extend the functionality of a class