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  1.  Home
  2. C400-L
  3. April 2014

First C program

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.

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