[C ++] Static global variables/global variables, static functions/common functions, static variables in functions/variables in functions, static member variables in classes/common class member variables

Http://blog.csdn.net/duckur/archive/2005/11/05/523545.aspx

Static global variable: File Scope: valid only in the declared file, invisible to other source files; with a static Lifecycle
Global variable: File Scope: extern can be added to declare as an external variable, cross-File Scope

Static (global) function: has a file scope and is only used in this file.
Global function: No File Scope

Static member (in function) variable: After the function is called, the variable is saved and called again. No space is allocated.
Member (in funcition) variable: life cycle in the function

Static member (in class) variable: belongs to the class range,
Member (in class) variable: belongs to a specific object derived from the class, with the same lifecycle as the object