Difference between and ?

Question

How come this code

std::map  m;
m[\"a\"]=1;

compiles with (I\'m using MSVC 2010)

#include 

        

Answer 1

contains C-library string functions. strlen, strcmp, etc.

contains the definition for std::basic_string, which has the typedefs std::string and std::wstring. That's the difference.

They really have no relationship at all, outside of the fact that they both deal with strings.