Difference between and ?

Question

How come this code

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

compiles with (I\'m using MSVC 2010)

#include 

        

Answer 1

is cstring - http://www.cplusplus.com/reference/clibrary/cstring/

is the c++ string class - http://www.cplusplus.com/reference/string/

Edit per Nicol Bolas comment below and a bit of googling:

will usually import the same things as but into the std namespace. will usually import everything into the global namespace. It appears to depend on the library implementation you're using though according to my googling.

Personally I only ever use if I need C style string helpers.