pragma once example

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# Pragma usage Overview

Each implementation of C and C ++ supports some unique features for its host or operating system. For example, some programs must precisely control the storage area where data is stored, or control the way a specific function accepts parameters. #

# Pragma once

# Pragma once is guaranteed by the compiler: the same file will not be contained multiple times. Note that the "same file" here refers to a physical file, not two files with the same content. The advantage is that you don't have to think about a

# Pragma once and # ifdef

Resolution # pragma command Among all the pre-processing commands, the # pragma command may be the most complex. It is used to set the compiler status or to instruct the compiler to complete some specific actions. # The Pragma command provides a

# Pragma comment

Pragma preprocessing instructionsPragma instructionsWhen coding, we often use the # pragma command to set the compiler status or instruct the compiler to complete some specific actions.The following describes some frequently used counters of this

# Pragma comment

Pragma preprocessing instructions Pragma instructions CompileProgramWe often use the # pragma command to set the compiler status or instruct the compiler to complete some specific actions. The following describes some common parameters of

pragma comment using pragma pre-processing instructions

#pragma comment ( comment-type [, "commentstring"]) The macro places a comment into the object file or executable file.Comment-typeis a predefined identifier that specifies the type of comment, which should

#pragma预处理命令

#pragma预处理命令The most complex preprocessing directives #pragma可以说是C + +, the following are the most commonly used #pragma directives:#pragma comment (lib, "XXX.lib")Indicates that the link XXX.lib this library, and is written in the project settings

# Pragma preprocessing command

# Pragma is the most complex preprocessing command in C ++. The following are the most common commands # pragma commands: # Pragma comment (Lib, "XXX. lib ") Link to the library XXX. Lib, which is the same effect as writing XXX. Lib in the Project

Linux # pragma usage

Precompiled command # pragma usage Recently, when I was looking at the code in an open-source project, I found that the # pragma program was used in many places. Therefore, I asked a Google instructor and summarized the common usage of the # pragma

#Pragma预处理指令

#Pragma是预处理指令, its role is to set the state of the compiler or instruct the compiler to perform certain actions. #Pragma指令对每个编译器给出了一个方法, to give the host or operating system proprietary features, while maintaining complete compatibility with the C

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