🚀 go-pugleaf

In <4kisn3$jbi@eng_ser1.erg.cuhk.hk> mfchan@cs.cuhk.hk (I'm a good man) writes:

>NULL = '\0' = 0. Defined in stdio.h or stdlib.h

You might be a good man, but this doesn't prevent you from being an
ignorant man, as well :-)

It is true that '\0' and 0 are the same.  They both have the same type and
value.  It is also true that 0 can be always used instead of NULL, but
the reciprocal is not necessarily true.  Proof:

    cnwgs1:~ 1> grep NULL /usr/include/stdio.h
    #ifndef NULL
    #define NULL    ((void *)0)

BTW, NULL is defined in <locale.h>, <stddef.h>, <stdio.h>, <stdlib.h>,
<string.h> and <time.h>.

Dan
--
Dan Pop
CERN, CN Division
Email: danpop@mail.cern.ch 
Mail:  CERN - PPE, Bat. 31 R-004, CH-1211 Geneve 23, Switzerland