First C program

[Frank Kolmann <fkolmann@xxxxxxxxx>]

Hi Barbara



Thank you, I have learnt some more.

I am using Jevgenis suggestion to pass pointers to pointers.

I have made fOpenFiles 'static', thanks for the warning.



Frank



> *From: Barbara Morris <bmorris@xxxxxxxxxx>

> *Date: Thu, 03 Apr 2014 13:31:44 -0400

> Rather than make the file pointers global,

> you could have the function just handle one file at a time,

> with the filename and open-mode as parameters, and returning the file
pointer.

>

> pf = fOpenFile (PFILENAME, "rr");

> ...

>

> static _RFILE *fOpenFile(const char *filename,

> const char *openmode,

> int rc)

> {

> _RFILE *f;

> f = _Ropen(filename, openmode);

> if (f EQ NULL)

> {

> printf("can't open file %s\n", PFILENAME);

> exit(rc);

> }

> return f;

> }

>

> Be careful to code "static" for any function that you want to be local to
the module.
> I would not use GLOBAL for this, since that would be very confusing, even
though it would work.