VC++ 中的 #include

最新推荐文章于 2024-10-29 21:05:39 发布

ralflee

最新推荐文章于 2024-10-29 21:05:39 发布

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分类专栏： WTL 文章标签： VC++ Microsoft C C++ C#

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本文详细介绍了VC++中#include指令的两种形式及其工作原理。包括如何使用引号形式和尖括号形式来指定包含文件的位置，以及编译器如何搜索这些文件。还解释了编译器选项/I的作用及环境变量INCLUDE的用途。

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vc++中，#include有两种形式：
[url]http://msdn.microsoft.com/en-US/library/36k2cdd4%28v=VS.80%29.aspx
[/url]
The #include directive tells the preprocessor to treat the contents of a specified file as if those contents had appeared in the source program at the point where the directive appears.

[quote]
#include "path-spec"
#include <path-spec>
[/quote]

[quote]Quoted form（引号）

总共四个地方
This form instructs the preprocessor to look for include files in the same [b]directory of the file that contains the #include statement[/b], and then in the [b]directories of any files that include (#include) that file[/b]. The preprocessor then searches along [b]the path specified by the /I compiler option[/b], then along [b]paths specified by the INCLUDE environment variable[/b].[/quote]
[quote]
Angle-bracket form（尖括号）

两个地方
This form instructs the preprocessor to search for include files first along [b]the path specified by the /I compiler option[/b], then, when compiling from the command line, along the path specified by [b]the INCLUDE environment variable[/b].
[/quote]

至于[b]the path specified by the /I compiler option[/b]，可以通过
配置属性-》c、c++-》命令行中看到有哪些