Character Sequences
Visual Studio 2015
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ANSI 3.8.2** The mapping of source file character sequences
Preprocessor statements use the same character set as source file statements with the exception that escape sequences are not supported.
Thus, to specify a path for an include file, use only one backslash:
#include "path1\path2\myfile"
Within source code, two backslashes are necessary:
fil = fopen( "path1\\path2\\myfile", "rt" );
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