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From: chans@marsh.cs.curtin.edu.au (Sean Chan)
Subject: Re: Fork ?
Message-ID: <chans.710389620@marsh>
Sender: news@cujo.curtin.edu.au (News Manager)
Organization: Curtin University of Technology
References: <1992Jul6.005853.21925@news.uiowa.edu>
Date: Mon, 6 Jul 1992 02:27:00 GMT
Referenced from "A Book On C : Programming in C" by Kelley, A. and I.
Pohl (2nd edition). Benjamin/Cummings 1990
pg. 426-427
fork - used to create a new process, the child process, that runs
concurrently with the parent process. Its unique to UNIX and is
not a part of ANSI.
eg.
#include <stdio.h>
#include <time.h>
main ()
{
int fork (void),
fib (int);
void sleep (unsigned);
if (fork () == 0)
for (i = 0; i < 30; ++i)
printf ("fib(%2d) = %d\n", i, fib(i));
else
for (i =0; i < 30; ++i) {
sleep (2);
printf ("elapsed time = %d\n", time (NULL) - begin);
}
}
int fib (int n)
{
if (n <= 1)
return n;
else
return (fib (n-1) + fib (n - 2));
}
Hope this helps...
Sean Chan
chans@marsh.cs.curtin.edu.au
pchans@cc.curtin.edu.au