Hi all,
A global variable in a file also can be access in
other files by including it...
extern type variable declaration mean that the
variable has a link in other file(no memory storage
allocation is done)...
Suppose two files are there...f1.c,f2.c.
f1.c ---u have declared "extern a;"
f2.c ---u have to include the f1.c file and
declared "int a;"
So here f1.c variable 'a' is linked to f2.c variable
'a'... at compile time only...
in this way extern and global differ's
i hope u understood now...
if u think in deep(by doing practically then u will
get more difference when we r doing project's with
many no of files then it may get usefull..)
Rgds
Madhukar
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