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From: kevin@ttidca.TTI.COM (Kevin Carothers)
Newsgroups: alt.sources
Subject: Re: LOTTO computer easy-pick lottery numbers generator
Keywords: lotto, lotteries, Keno, drand48(), Lucky 13, RNG
Message-ID: <22647@ttidca.TTI.COM>
Date: 14 Jan 91 19:03:58 GMT
References: <388@tnl.UUCP> <7457@minyos.xx.rmit.oz.au> <1991Jan12.171423.5842@jpradley.jpr.com>
Organization: Citicorp/TTI, Santa Monica
Lines: 88

In article <1991Jan12.171423.5842@jpradley.jpr.com> jpr@jpradley.UUCP (Jean-Pierre Radley) writes:
%In article <7457@minyos.xx.rmit.oz.au> Michael Barnett writes:
%>norstar@tnl.UUCP (Daniel Ray) writes:
%>
%>
%> >source code. Presumes that you have the drand48() C function.
%>
%>I'd like to, but where do I find the drand48() C function, or is that a dumb
%>question?
%
%
%It's been part of the C library on all the *nix that I've run for the last
%eight years.

 this lotto generator didn't make it here. 
 Here's one I cooked up. I have  my own random generator 
 that I snarfed out of D. Knuth Vol 3 (remember that one ? :-)
 which seems to be "random enough".

 Just whack at it a little to tailor it to the game of your choice.
 Wrote it on a SUN. Should be fairly transportable (no serious lint
 errors).
--------------------------------------------------------------------
#include <stdio.h>
#include <sys/types.h>
#include <sys/timeb.h>


#define xrand(x)  ((x * 1103515245 + 12345) & 0x7fffffff) 
#define SIZE (sizeof nums / sizeof(nums[0]))
int Cnt = 0;
main(argc,argv)
int argc;
char *argv[];
{

int j, i, k, seed;
struct timeb *tp;
long time();
int nums[6];
int tnbr;
extern int errno;

    for(k=0; k<((argc==2)?argc:1); k++) {
	seed = (int) time(&tp);
	printf("Lucky lotto number is: ");

	for (i=0; i < SIZE; i++) {
	    *(nums+i) = 0;
	    grand(&seed,&nums[0], i);
	    }

	for(i=0; i < SIZE; i++) 
	    for(j=0; j < i; j++) 
		if(nums[j]>nums[i]) {
		    tnbr = nums[j];
		    nums[j] = nums[i];
		    nums[i] = tnbr;
		}

	for(i=0; i < SIZE; i++) {
		printf("%d%s",nums[i],((i<5)?"-":" "));
		nums[i] = 0;
	}
	printf("\n");
    }
}

grand(seed, pnbr, start)
int *seed;
int *pnbr;
int start;
{
	int i, j, nbr;
   	nbr = 0;

        while (!nbr) {
	    nbr = *seed = (int) (xrand(*seed) % 54);
	    }

	for(j=0; j<=start; j++) {
	    if ((nbr == *(pnbr+j)) && (*(pnbr+j) != 0)){ /* No duplicates */
		*seed +=  (int) xrand(*seed);
		grand(seed,pnbr,start);
		}
	    }
	    *(pnbr+start) = nbr;
}