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Mail Archives: cygwin/1998/01/08/23:40:22

From: banders AT ECD DOT Rockwell DOT COM (Bartlee A. Anderson)
Subject: Rnadom numbers
8 Jan 1998 23:40:22 -0800 :
Message-ID: <34B5631E.35A2.cygnus.gnu-win32@switch.rockwell.com>
Mime-Version: 1.0
To: gnu-win32 AT cygnus DOT com

After I figured out how to do random and eliminated the access violation
when trying to do time functions, here's a little more random version
for getting different numbers for different runs.


program listing
---------------
#include <stdio.h>
#include <stdlib.h>
#include <winbase.h>
main()
{
int myvalue;

static SYSTEMTIME SystemTime;

GetSystemTime(&SystemTime);

srand(SystemTime.wMilliseconds); /* use millisecond timer as seed for
srand *

myvalue = rand();

srand(myvalue); /* more randomness */

myvalue = ((float)rand()/RAND_MAX)*100.0; /* scale from 0 to 100 */

printf("%d\n",myvalue);
myvalue = ((float)rand()/RAND_MAX)*100.0; /* scale from 0 to 100 */

printf("%d\n",myvalue);
}

Seems to work fine for me.
Donated to public domain
#include <no_warranties>
#include <other_disclaimers>
-- 
Bartlee A. Anderson     System Test (Interfaces-Tools-Automation-ISDN)
Rockwell International                    Electronic Commerce Division
300 Bauman Ct.                                banders AT ecd DOT rockwell DOT com
MS 933-605      Opinions my own, not Rockwell's   VOICE (630) 227-8975
Wood Dale, IL 60191                               FAX   (630) 227-9771
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