const static

1, define usage:Define is mainly defined with macro constants, making the program look more concise, easy to maintain code, #define定义的实质只是一个常数的名字, no specific data types, no allocated memory space. The compiler is replaced with the constant when

Google Editor is good, you can automatically save, I worked hard for half a day to lose all the words The keywords in the topic are often involved in the interview, here is a brief introduction to their functions and use of attention. Const can

? Use of FriendsDivided into friend and friend functions BlankTest.cpp: Defines the entry point of the console application. // The common denominator of friend and friend functions: You can have one class as a parameter of another class or

The DES algorithm is one of the most general symmetric key algorithms, because the algorithm itself is public, so its security lies in the security of the key. There are usually two kinds of algorithms based on key: symmetric algorithm and public

The example described in this paper is a program code to implement DES encryption algorithm, in C + +, des encryption is a more commonly used encryption algorithm, and the application is very extensive. This CPP file can meet your DES encryption

The const -defined constants are freed after the function executes, and static constants defined by the statics are not freed when the function is executed. However, whether they are const or static, the content they define will be known to the

Des. h file: //////////////////////////////////////// //// // * Provided by Zhu Meng bin, national University of Technology Email: zmb.tsubasa@gmail.comThis product is free for use. */////////////////////////////////////// /// // # ifndef des_h #

The space of a constant defined by const is released after the function is executed, while the static constant defined by static is not released after the function is executed. Static indicates static. Static member functions of a class. member

　　A const-defined constant is freed after its scope has been exceeded, and static constants defined by Statics do not release their storage space after the function executes.Static is expressed statically. Static member functions and static member

Like any other member, a Const member appears in three positions: global scope, common function, and class.See the test code for the front:1 # include "stdafx. h"2 # include 34 using namespace std;56 class7 {8 public:9 const int j;10 // const int k =

Qtusb. h # Ifndef qtusb_h# Define qtusb_h # Include # Include # Include Class qtusb: Public qobject{Q_objectPRIVATE:Const static int interface = 0;Const static int configuration = 1;Const static int endpoint_in = 0x81;Const static int

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I finally wrote the SmartGUi library in half, and the basic architecture was built up.Now I plan to write a blog for development.Although I have done GUI before, I still want to do it well this time (it would be nice if I name it like CEGUI or MYGUI)

<> Note: This article is organized by a post in a forum. Remember: Static data members are usually declared in the class declaration and initialized in files containing Class methods. during initialization, the scope operator is used to indicate

Recently see effective C + + often see some and static related content, hope that a comprehensive collation, if not all, also hope to add:Static member variables in Class 1Static members Unlike normal data members, static data members exist

Remember: normally static data members are declared in the class declaration and initialized in the file containing the class method. Use the scope operator to indicate the class to which the static member belongs when initializing. However, if the

Static member features  Static member functionsNo this pointer. Static member functionsCannot be declared as Const. Static member functionsCannot be declared as a virtual function. Static member functionsYou can directly access static

Index. cpp: 59: In-class initialization of static data member of non-integral type 'const string'Index. cpp: 60: In-class initialization of static data member of non-integral type 'const string'Index. cpp: 61: In-class initialization of static data

iOS version big turntable Using the Cabasicanimation animation with iOS to achieve a simple, core code : Rotating animation Cabasicanimation *anim = [cabasicanimation animationwithkeypath:@ "transform.rotation"]; Start position

#include "RLib.h"//////////////////////////////////////////////////////////////////////////const static unsigned int MAX_LINE_LENGTH = 76;const static char BASE64_ALPHABET [64] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', // 0 - 9'K', 'L'