how to use define

Linux/include/uapi/asm-generic/errno.h1 #ifndef _asm_generic_errno_h 2 #define _ASM_GENERIC_ERRNO_H 3 4 #include 5 6 #de Fine Edeadlk 35/ * Resource deadlock would occur * /7 #define Enametoolong 36/ * File name too long * /8 #define ENOLCK 37/ *

Java Object-oriented review1. The class is abstract and the object is specific 2. Method overloading: Condition: (1): In the same Class (2): Method name is the same (3): Method parameter is different 3. Construction Method: Syntax : (1) must be the

Although the programming style guide, but a lot of dry, very many C + + useful technology in it.Header fileUsually each. cpp file corresponds to a. h file;#define保护All header files should use # define to prevent header files from being included in

1. #define的保护All header files should use # define to prevent header files from being multi-contained (multiple inclusion), naming the formatWhen is: ___h_To ensure uniqueness, the name of the header file should be based on the full path of the

NAMEStat Get file propertiesThis function is located in the header file.Function Prototypes:int stat (const char *path, struct stat *buf);Number of references:Path file paths + file nameBUF Pointer to bufferreturn value:-1 encountered an error0

This structure is moved from list.h to Types.h, and the core's attention to the circular list is visible.Defined in Include/linux/types.hstruct List_head {struct List_head *next, *prev;};Macros in the Include/linux/list.hInitialize a linked list

In a recent project, it was found that the previous regular matching modules had a very bad performance penalty for long string matching, so the various regular matches under the long string were slightly studied and attached with examples. This

Const refers to a compile-time constant.Keywordconst allows the code to determine whether a variable can be altered.With const, you can prevent changes to variables or pointers, and more importantly, a const reference prevents changes to the

The C standard defines the following exit functions:#include void exit (int status);void _exit (int status);int atexit (void (*function) (void));function functions are described as follows:     void exit (int status)     The function terminates

some days ago, some netizens asked: the ASP recordset output into N columns of the form display method, now write a, convenient for everyone to use. ' Define variablesDim Cn,rs,sql SQL = "Select CustomerID from Orders" ' Total recordsDim

@access Scope of Use: Class,function,var,define,module This tag is used to indicate access rights for keywords: private, public, or proteced @author Specify the author @copyright Scope of Use: Class,function,var,define,module,use Specify

Some days ago, some netizens asked: the ASP recordset output into N columns of the form display method, now write a, convenient for everyone to use. ' Define variable Dim Cn,rs,sql Sql = "Select CustomerID from Orders" ' Total Records

The following two things are mainly done in this program fragment:1) Finish the output Hello world.2) confusing C language code. #define _________} #define ________ Putchar #define _______ Main #define _ (a) ________ (a); #define ___ _

What is a struct? In c language, a struct (struct) is a data structure that is a class of aggregate data types (aggregate-type) in the C language. Structs can be declared as variables, pointers, or arrays to implement more complex data

Here's a description.1. Echoecho is a keyword in PHP that has no return value. In the notation, it can omit parentheses. The following code: Copy the Code code as follows: Echo ' Test String ';Echo (' Test String ');2. PrintPrint is also a keyword

This paper is a summary of some knowledge points of Requirejs, and is matched with example analysis in multiple pages application. The directory structure of this case is as follows: Three main functions of the Requirejs API: Define (Create Module)

Individuals tend to require.jsAMD is the normalized output of the module defined by REQUIREJS during the promotion process.CMD is the normalized output of the module defined by SEAJS in the process of generalization.Similar to the CommonJS modules/2.

What is the relationship between Gulp, Requirejs and Webpack? AMD and CMD are modular specifications respectively Requirejs and SEAJS are respectively a scheme for implementing the specification. On-Line compiling module scheme:

1. What is Phpdocumentor? Phpdocumentor is a tool written in PHP, and for PHP programs with canonical annotations, it can quickly generate API documents with cross-references, indexes, and so on. The old version is Phpdoc, starting with 1.3.0,

MD5, all known as Message Digest algorithm 5 (the fifth edition of the Messaging Digest algorithm). For more information, please refer to Wikipedia: MD5 MD5 is encrypted with a byte array, but we typically take its hexadecimal string notation, and