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Two Distinct #include Directives

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The preprocessor #include directive appears in two flavors:

 #include < vector > // angular brackets

and

 #include "myclass.h" // quotes

The two are not interchangeable. The angular-bracket version applies to standard header files.

The quoted version applies to all the rest: user’s header files or implementation dependent ones (like “winsock.h”). The quoted version may contain the full path name. Otherwise, the current directory is assumed.

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