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Summary of common macro definitions in 20 C languages

01: Prevent a header file from being repeatedly included#ifndef Comdef_h#define Comdef_hHeader file Contents#endif02: Redefine Some typesPrevents different types of bytes generated due to various platforms and compilers, which facilitates

C language macro definition usage tips

Write good C language, beautiful macro definition is very important, the use of macro definitions can prevent errors, improve portability, readability, convenience and so on. The following is a list of commonly used macro definitions in mature

__FILE__,__LINE__,FUNCTION__ implementation of code-tracking Debugging (Linux C language programming)

[Email protected]:~/cpropram/2# cat global.h//header file#ifndef Clobal_h#define Global_h#include int Funca (void);int funcb (void);#endif[Email protected]:~/cpropram/2# cat funca.c//function A#include "global.h"int Funca (void){printf ("This is

FILE__,__LINE__,FUNCTION__ implementation Code tracking (reprint)

root@xuanfei-desktop:~/cpropram/2# cat global.h//header file#ifndef Clobal_h#define Global_h#include int Funca (void);int funcb (void);#endifroot@xuanfei-desktop:~/cpropram/2# cat FUNCA.C//function A#include "global.h"int Funca (void){printf ("This

Go C Language Macro Definition Tips

C language Macro definition tips (common macro definitions)Write good C language, beautiful macro definition is important, using macro definition can prevent errors, improve portability, readability, convenience and so on. The following is a list of

Redis learning Manual (String data type)

I. Overview:The string type is the most basic data storage type in Redis. It is binary safe in Redis, which means this type can accept data in any format, for example, JPEG image data or Json object description information. In Redis, the maximum

Kdj metric analysis usage highlights

Kdj Metrics The Random Index was first proposed by Dr. George Lane and is a very novel and practical technical analysis index. It was first used for the analysis of the futures market, it is widely used in the middle and short-term trend analysis

C # BASIC programming----types and variables

There are two kinds of types in C #: Value types and reference types (Reference type). Variables of value types directly contain their data, whereas a variable of a reference type stores a reference to their data, which is called an object. For

C Language Macro Definition Tips

Network Source: http://blog.chinaunix.net/uid-14022540-id-2849095.html usage of "#" and "# # " in macros I. GENERAL usageWe use # to turn the macro parameter into a string , and use # # to fit the two macro parameters together .

Redis data type -- string

Redis data type-five data types: string, list, set, zset, hash1 ). string is the simplest type. A key corresponds to a value. String is binary secure. Redis string can contain any data, such as JPG images or serialized objects (Object serialization

Data type of Windows API and Delphi data type comparison table

Windows Data types Delphi Data types Describe LPSTR Pansichar string pointers LPCSTR Pansichar string pointers DWORD Longword Integer BOOL

[CLR via C #] 5.1 primitive type

Some data classes are very commonly used in development, so many compilers allow the code to operate on them with simplified syntax. For example, you can use the following syntax to assign an integer: System.Int32 a = new System.Int32();    int a = 0

Comparison between Windows API data types and Delphi Data Types

Windows Data Type Delphi Data Type Description Lpstr Pansichar String pointer Lpcstr Pansichar String pointer DWORD Longword Integer Bool Longbool Boolean

Memory ing to modify large files

Overview This article describes how to use a memory ing file to modify a large file: Add a piece of data before the memory of a large file. To use a memory ing file, perform the following steps: Create or open a file kernel object to identify the

Comparison between data types of Windows APIs and Delphi data types (reference)

Windows Data Type Delphi Data Type Description LPSTR PAnsiChar String pointer LPCSTR PAnsiChar String pointer DWORD LongWord Integer BOOL LongBool Boolean PBOOL ^ BOOL

Data type of Windows API and Delphi data type comparison table

Original: Data type of Windows API and Delphi data type comparison table Windows Data types Delphi Data types Describe LPSTR Pansichar string pointers LPCSTR Pansichar

Read the Classics-"CLR via C #" (Jeffrey Richter) Notes _ primitive types

ConceptData types directly supported by the compiler"C # Primitive types and corresponding FCL types" C # Primitive types FCL type Description SByte System.SByte Signed 8-bit value Byte

Redis Tutorial (ii): String data type

First, overview: The string type is the most basic type of data storage in Redis, which is binary safe in Redis, which means that the type can accept data in any format, such as JPEG image data or JSON object description information. The value of

Basic concepts of JavaScript (iv) --- operators and javascript Operators

Basic concepts of JavaScript (iv) --- operators and javascript OperatorsOperator 1. unary operator The operator that can operate only one value is called The unary operator. The unary operator includes the increment (decrement) operator and the

Some knowledge about Java

I. Enumeration typeExample code:public class Enumtest {public static void Main (string[] args) {Size S=size.small;Size T=size.large; //s and T refer to not the same objectSystem.out.println (s==t); //Run result is false, only int, float data type is

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