Date: Fri, 17 May 2002 20:27:04 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: djgpp AT delorie DOT com
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In-reply-to: <ac39ir$m9gr2$1@ID-106847.news.dfncis.de> (noone@knowhere.com)
Subject: Re: Static variables
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> From: "Matthew Bayliss" <noone AT knowhere DOT com>
> Newsgroups: comp.os.msdos.djgpp
> Date: Fri, 17 May 2002 17:03:03 +0100
> 
> If you break on line 117 and "print words_ptr" the pointer has an
> assignment.  When the function returns to main() (line 31) the variable has
> no value.

That's because C passes variables by value; if you want to change the
variable's value, you need to pass its address.

In this case, you want `inputdata' to change the value of the variable
words_ptr, so you need to pass its address, like this:

   if ( inputdata( &words_ptr ) == 0 ) // Read the data in.

Of course, the function's prototype should also change:

 int inputdata( struct wordstruct **words_ptr ); // Function to read words

And the code of `inputdata' should change accordingly as well.