#define __STDC_WANT_LIB_EXT1__ 1
#include <stdio.h>
#include <stdlib.h>

wchar_t wbuffer[] = {
    0x0073,
    0x0074,
    0x0072,
    0x0069,
    0x006e,
    0x0067,
    0x0000
  };

int main()
{
    char    mbsbuffer[50];
    int     i;
    size_t  retval;
    errno_t rc;

    rc = wcstombs_s( &retval, mbsbuffer, 50, wbuffer, sizeof( wbuffer ) );
    if( rc == 0 ) {
        for( i = 0; i < retval; i++ )
            printf( "/%4.4x", wbuffer[i] );
        printf( "\n" );
        mbsbuffer[retval] = '\0';
        printf( "%s(%d)\n", mbsbuffer, retval );
    }
    return( rc );
}