Be prepared for some obfuscated answer.
The \ is the escape character (you have probably already encountered the \n escape sequence for example), and \\ is the escape sequence that represents a single \ character (in a sense, it can be understood as an escape of the escape character). If you really want to have \\ in your string, you'll have to use \\\\ :
std::cout << "\\\\something\\" << std::endl; /* prints "\\something\" */
Just to provide another example, suppose you'd like to have some " in a string. Writing :
const char *str = "Hello "World"";
will obviously not compile, and you will have to escape the " with a \ :
const char *str = "Hello \"World\"";
In C++0x you will have a raw string literal:
R"(anything can appear here, even " or \\ )"
Where everything between "( and )" is part of the string -- no escaping necessary. In the current standard you can't achieve what you want.
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