c++ - _bstr_t concatenate gives 12142 -

i have strange thing here. i'm concatenating _bstr_t strings in order assemble sql command.

_bstr_t strsql = a+b+k+hk+allin+hk+k+hk   

...and on.

when print console (using std::wcout << '/n'<< strsql << '/n';) string, 12142 in beginning , end of string. looks like:

 12142"select * from....."12142 

does know comes from?

i'm using: vs2010 express, c++, , i'm building console app.

you wrote '/n' instead of '\n'. multicharacter literal, in case gives integer value 12142.