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#import "RanGen.h"
#import <appkit/appkit.h>
#import <math.h>
#import <stdio.h>
#import <sys/time.h>
@implementation RanGen
// ----------------------------------------------------------------
+ new
{
long t;
int seed;
self = [super new];
time (&t);
seed = t; // is time-based!
// printf("RanGen: new random seed = %d\n",t);
srandom(seed);
return self;
}
// ----------------------------------------------------------------
// ran01: Linear congruential method based on
// the random() supplied by the C library.
// Allegedly random() is better than rand().
- (double) ran01
{
double aRand;
aRand = (double)random()/2147483648.0;
// printf("%lf\n",aRand);
return aRand;
} // end of ran01
// ----------------------------------------------------------------
- (int) lowInt: (int) lowestNumber highInt: (int) highestNumber
{
double r,t;
// integer arithmetic requires to add 1 to difference. If this
// is not done, the highest number is not included.
// for instance low=10, high=20. Then it has to be r=11, because
// random is never exactly equal to 1.
r = (double) highestNumber - (double) lowestNumber + 1;
t = r * [self ran01];
return lowestNumber + (int)t;
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.