Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!bu-cs!dartvax!eleazar.dartmouth.edu!earleh
From: earleh@eleazar.dartmouth.edu (Earle R. Horton)
Newsgroups: comp.sys.mac.programmer
Subject: Re: i.o. problem with MPW C
Keywords: MPW, C
Message-ID: <12798@dartvax.Dartmouth.EDU>
Date: 29 Mar 89 00:23:44 GMT
References: <222@uw-apl.UUCP>
Sender: news@dartvax.Dartmouth.EDU
Reply-To: earleh@eleazar.dartmouth.edu (Earle R. Horton)
Distribution: na
Organization: Thayer School of Engineering
Lines: 48

In article <222@uw-apl.UUCP> keith@uw-apl.UUCP (Keith Kerr) writes:
>I've just started using MPW C, and I'm having a problem with
>very simple i/o.  I've tried several variations of the following
>program (which runs fine on UNIX), but without success.  The
>output file gets created, but upon completion it is either
>empty, or unreadable.  Any pointers as to what I'm doing 
>wrong would be helpful.

     When you "fopen()" a file for writing with MPW C, it has the
default creator '    ' and default type '    ' unless you arrange for
it to have something else.  There wasn't anything wrong with this
program, except that it created its output file to be a '    ' file
instead of a 'TEXT' file, and your editor probably wouldn't open it.

     When using stdio to create files on the Mac with MPW C, you have
to set the file type and creator, as below.

------------------------------------------------------------------
#include <stdio.h> /* for buffered file output */

int main() /* prints out data to check it */
{
  FILE *out_file, *fopen();
  char *filename = "check_file_out";
  int how_much = 64, index, ok;
  
  Create(filename,0,'MPS ','TEXT');	/* So a text editor will open it. */
  out_file = fopen(filename, "w");
  if (out_file == NULL)
    {
	  /*SysBeep(5);*/
	  return;
	}
  else
    for (index = 1; index <= how_much; ++index)
      fprintf(out_file, "This shoulda been %d\n", index); 
		
  ok = fclose(out_file); 
  if (ok == (-1))
    {
	  return;
	  /*SysBeep(5);*/
	  /*SysBeep(5);*/
	}
  return(0);
}

earleh:xyzzy:32768:7:Earle R. Horton,,,6434109:/hackers/earleh:/bin/rn