const

key point: Const is a modifier, and the key is to see where the Const modifier is.1, const int *Ahere the const modifier is int, and int defines an integer valueTherefore, the object value pointed to by *a cannot be modified by *a, but can be

A const reference is a reference to a const object. Copy codeThe Code is as follows: const int I = 10; Const int & ref = I; You can read the ref but cannot modify it. This makes sense, because I itself cannot be modified, and of course it cannot

the top-level const is a constant (immutable) that represents the object itself;The underlying const is a constant (pointed immutable) that represents the object to which it is pointing;1#include 2 3 intMain ()4 {5 intI=0;6 int*Constp1=&i;//-

A const reference is a reference to a const object. Copy Code code as follows: const int i = 10; const int &ref = i; Ref can be read, but cannot be modified. It makes sense to do so because I cannot modify it, and of course

What does it mean after the const drop function:The const modifier is placed after the function, which is exactly the object that the this pointer is pointing to.For example:Class Student{PublicGetName (int);Privateint stu_id;};The GetName ()

Const & pointer In the type declaration, const is used to modify a constant. There are two ways to write it. So, what are the following statements that use const to limit immutable content? 1) const is in front Const int nvalue; // nvalue is

Which definitions are the same for several statements? What are the different definitions? What data can be modified? What data is not modifiable?1 Const int A; 2 int Const A; 3 Const int *A; 4 INT *const A; 5 int Const *const A;In C + +, const is

      Const is a C-language keyword that restricts a variable from being allowed to change. The use of const to some extent can improve the security and reliability of the program, in addition, when watching other people's code, clearly understand

      The const keyword exists in both C and C ++ languages. Many people have a wrong idea about this keyword. In C, the const keyword is used to make the variable as a constant, variable normalization is like macro definition. In C, the keyword

Reproduced to: http://www.cppblog.com/Marcky/archive/2009/07/12/89796.html C ++ primer mentions that "only when the form parameter is a reference or pointer, whether the form parameter is const affects the carrying capacity ."Int add (int A, int B )

Read it backwards ... int*-Pointer to int int const *-Pointer to const INT int * const-Const pointer to int int const * const-const pointer to const INT Now the first const can is on either

My main blog: half an acre of Square pondThe main references of this paper come from: C + + Primer Chinese version (5th edition) 57th to 58th side1. Top-level const and underlying const conceptAs we know, the pointer itself is an object, because the

Global Variables: Class, outside of the method, the class directly write NSString * str = @ "xxx"; STR is a global variable (object oriented, to use global variables, generally set as properties of the Class) Local Variables: Variables written

C ++ Primer study note _ 24 _ class and data abstraction (10) -- static and Singleton modes, auto_ptr and Singleton modes, const member functions, const objects, mutable modifiers, constmutable C ++ Primer study note _ 24 _ class and data

Reprint Please specify the source http://blog.csdn.net/xingjiarong/article/details/47282255Keyword const is used to define constants, if a variable is modified by const, then its value can no longer be changed, I think someone must have this

The const usage is detailed Const READONLY (Read only) Example one: read-only int variableint main (int argc,const char * argv[]) {const INT A1;    int const A2;    A1 = 2;//A2 = 3;    printf ("%d\n", A1);   printf ("%d\n", A2); }

1. Const BasicsIf the const keyword does not involve pointers, we can understand it very well. The following is a case involving pointers: Int B = 500;Const int * A = & B; [1]Int const * A = & B; [2]Int * const A = & B; [3]Const int * const A = & B;

Http://www.job168.com/info/read_79075.htmlPosting date: a const Basics If the const keyword does not involve pointers, we can understand it very well. The following is a case involving pointers: Int B = 500; Const int * A = & B; [1] Int const * A =

I. Const BasicsIf the const keyword does not involve pointers, we can understand it very well. The following is a case involving pointers: Int B = 500;Const int * A = & B; [1]Int const * A = & B; [2]Int * const A = & B; [3]Const int * const A = &

Recently in re-see >, the first time, the const and constexpr did not understand very well, this time there are some newer understanding, of course, there may still be many wrong places ...First, the const qualifier is "constant", and once a const