c++ secure library - from visual studio 2005

_s ==> secure library

1. sprintf_s, _sprintf_s_l, swprintf_s, _swprintf_s_l 
• MSDN: http://msdn.microsoft.com/en-us/library/ce3zzk1k(VS.80).aspx
• Korean blogs: http://blog.naver.com/tomatoalive?Redirect=Log&logNo=40077924809
  
2. fopen_s, _wfopen_s 
• MSDN: http://msdn.microsoft.com/en-us/library/z5hh6ee9(v=VS.80).aspx
• Korean blogs: http://warmz.tistory.com/87
3. Examples from MSDN

• // crt_sprintf_s.c
  // This program uses sprintf_s to format various
  // data and place them in the string named buffer.
  //
  
  #include <stdio.h>
  
  int main( void )
  {
     char  buffer[200], s[] = "computer", c = 'l';
     int   i = 35, j;
     float fp = 1.7320534f;
  
     // Format and print various data: 
     j  = sprintf_s( buffer, 200,     "   String:    %s\n", s );
     j += sprintf_s( buffer + j, 200 - j, "   Character: %c\n", c );
     j += sprintf_s( buffer + j, 200 - j, "   Integer:   %d\n", i );
     j += sprintf_s( buffer + j, 200 - j, "   Real:      %f\n", fp );
  
     printf_s( "Output:\n%s\ncharacter count = %d\n", buffer, j );
  }

  #include <stdio.h>
  
  FILE *stream, *stream2;
  
  int main( void )
  {
     int numclosed;
     errno_t err;
  
     // Open for read (will fail if file "crt_fopen_s.c" does not exist)
     if( (err  = fopen_s( &stream, "crt_fopen_s.c", "r" )) !=0 )
        printf( "The file 'crt_fopen_s.c' was not opened\n" );
     else
        printf( "The file 'crt_fopen_s.c' was opened\n" );
  
     // Open for write 
     if( (err = fopen_s( &stream2, "data2", "w+" )) != 0 )
        printf( "The file 'data2' was not opened\n" );
     else
        printf( "The file 'data2' was opened\n" );
  
     // Close stream if it is not NULL 
     if( stream)
     {
        if ( fclose( stream ) )
        {
           printf( "The file 'crt_fopen_s.c' was not closed\n" );
        }
     }
  
     // All other files are closed:
     numclosed = _fcloseall( );
     printf( "Number of files closed by _fcloseall: %u\n", numclosed );
  }