How to convert wchar_t* to char*

#include <locale> #include <iostream> #include <string> #include <sstream> using namespace std ; wstring widen( const string& str ) { wostringstream wstm ; const ctype<wchar_t>& ctfacet = use_facet< ctype<wchar_t> >( wstm.getloc() ) ; for( size_t i=0 ; i<str.size() ; ++i ) wstm << ctfacet.widen( str[i] ) ; return wstm.str() ; } string narrow( const wstring& str ) { ostringstream stm ; const ctype<char>& ctfacet = use_facet< ctype<char> >( stm.getloc() ) ; for( size_t i=0 ; i<str.size() ; ++i ) stm << ctfacet.narrow( str[i], 0 ) ; return stm.str() ; } int main() { const char* cstr = "abcdefghijkl" ; const wchar_t* wcstr = widen(cstr).c_str() ; wcout << wcstr << L'/n' ; const wchar_t* wcstr = L"mnopqrstuvwx" ; const char* cstr = narrow(wcstr).c_str() ; cout << cstr << '/n' ; }