Preprocessor question

[Doug Gwyn]

In article <531 at ole.UUCP> ray at ole.UUCP (Ray Berry) writes:
>#define VAL 3
>#define STR(x) #x
>  puts("val is " STR(VAL));
>   Turbo C produces "3" for STR(VAL); Microsoft produces "VAL" and 
>leaves it at that.  
>   Which behavior is correct?

"Before being substituted, each argument's preprocessing tokens are
completely macro replaced as if they formed the rest of the
translation unit; no other preprocessing tokens are available."

So VAL is first expanded to 3 then the #3 is performed to produce
"3".