/**
* Copyright (c) 2001,2002 Yoon, Hyunho <hhyoon@kldp.org>
* http://mooo.org
* ----------------------------------------------------------------------
*
* LICENSE
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/timeb.h>
#define MAX_NUM 100000
#define PRINT 0
void main(void)
{ int i, j, count = 0;
struct _timeb start, finish;
_ftime(&start);
for (i = 2; i <= MAX_NUM; i++) {
for (j = 2; j < i; j++) {
if (i % j == 0)
break;
}
if (i == j) {
if (PRINT)
printf("%3d is a prime.\n", i);
count++;
}
}
_ftime(&finish);
printf("Num of primes from 2 to %d: %d\n", MAX_NUM, count);
printf("%.3f seconds\n", (finish.time + finish.millitm / 1000.)
- (start.time + start.millitm / 1000.));
}
