constant difference definition

What is a class constant? What we can understand in PHP is that the value is constant, so what is a class constant? In fact, the class constants are also easy to understand, we can always keep the constant value of the class is called constants, and

　　They have a common advantage is "change the whole, to avoid the input error" What are the two different? Some.The main difference is that the macro definition is done prior to compilation, and the const is processed during the compilation

Define section:Macros can be used not only to replace constant values, but also to replace expressions or evenCode. (Macros have powerful functions but are prone to errors, so their advantages and disadvantages are quite controversial .) Macro

Recently began preparing for a lab study while documenting some of the programming trivia points encountered. Today when testing the SVD decomposition of matrices, we need to define the size of the rows and columns of the matrix, and I used to

This article mainly introduces the C language of constant pointer and pointer constant difference, the need for friends can refer to A constant pointer refers to a pointer to a constant, as the name suggests, is the pointer to a constant, that is,

The following code uses the platform Windows 64bits+vs2012.The following concepts are often encountered when programming in C + +: constants, literal constants, symbolic constants, literal constants, constant variables, string constants, and

Overviewfor beginners, pointers are always a very difficult concept to understand in C language. In this article, we'll explain the difference between constant pointers, pointer constants, const pointer to const (PS: The landlord thinks this can be

constant PointerRefers to--a pointer to a constant, as the name suggests, is the pointer to a constant, that is, it can not point to the variable, it points to the content can not be changed, not through the pointer to modify the content it points

Macro: Usually put some commonly used strings, basically leave the definition macro1. Compile time is different: const is compiled at the time of compilation, the macro is compiled at the time of compilation (pre-compilation is the program load,

ObjectiveA few days ago the woman ticket asked me a Ali's face question, is about the C + + language const constant, in fact, she mentioned that I know the point of inspection: it is certain that the const constant memory is not allocated in the