From: Douglas Gleichman <doug AT tcville DOT es DOT hac DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Ghosts in DJGPP :-)
Date: 29 Jan 1997 10:01:48 -0800
Organization: Hughes Aircraft Company
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Sender: doug AT X-147-16-128-32 DOT es DOT hac DOT com
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References: <Pine DOT GSO DOT 3 DOT 95 DOT 970128014035 DOT 27048B-100000 AT hops DOT cs DOT jhu DOT edu>
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To: djgpp AT delorie DOT com
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Michael Phelps <morphine AT hops DOT cs DOT jhu DOT edu> writes:
> Output in DJGPP is buffered by default.  There are a couple quick fixes
> for your code:
> (1)  printf("Hi , "); -> printf("Hi, , \n"); /* newline forces write */
> (2)  fflush(stdout); /* after printf() */

Or just put 
 
    setbuf(stdout, NULL);

at the beginning of main.