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Lesson 26 static member functions of classes

2022-04-23 12:07:00 【Night rain】

Lesson 26 Static member function of class

List of articles

One 、 Static member functions

characteristic

  • You can access static member variables without relying on objects
  • The security of static member variables must be guaranteed
  • Get the value of static member variable conveniently and quickly
  • Static member functions are special member functions in a class
  • Static member functions belong to the entire class
  • You can directly access public static member functions through the class name
  • Public static function members can be accessed through objects

Definition

static type function()

Directly through static Keywords decorate member functions

Two 、 Static member functions and ordinary member functions

Static member functions Ordinary member functions
All objects share √ √
Implication this The pointer × √
Access ordinary member variables （ function ） × √
Access static member variables （ function ） √ √
Call... Directly by class name √ ×
Call directly through the object name √ √

3、 ... and 、 Summary

  • Static member functions are special member functions in a class
  • Static member functions have no hidden this The pointer
  • Static member functions can be accessed directly through the class name
  • Static member functions can only access static member variables directly （ function ）

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