Peter,

Use the <pre> and </pre> tags.

Here's an example, including a way to make it cope with either byte ordering:

union bw 
{ 
   uint w; 
   struct
   { 
#ifdef BIGENDIAN
      uchar h; // MSB first 
      uchar l; 
#else
      uchar l; 
      uchar h; // MSB last 
#endif
   } b; 
};