Re: First C program

On 2014-04-03 06:42, Frank Kolmann wrote:
> I have posted the new source here.
> http://wiki.midrange.com/index.php/C_version_of_DISPR
> As Barbara suggested I moved the Open of the files into a function.
> I had to make the file pointers GLOBAL, to get the program to work.

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.

-- 
Barbara

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