random.h

来自「文化算法的实际应用」· C头文件 代码 · 共 59 行

// Functions for the random handling of n úm eros, genetic.
// Without modifying, except for randomize to receive the seed from invocaci ón.  
#ifndef RANDOM_H
#define RANDOM_H

#include <CMath>
namespace CAEP
{
	class CARandom
	{
	private:
		int seed;
		int jRand;
		double oldRand[55];
		double randX2;
		int randCalcFlag;

	public:
		CARandom(float seed = 1);

		void Init(float seed);
		void InitNormalDeviate(float calcFlag = 1);

		/* Create next batch of 55 random numbers */
		void AdvanceRandom();

		/* Get random off and running */
		void WarmUpRandom(float random_seed);


		/* random normal deviate after ACM algorithm 267 / Box-Muller Method */
		double RandomNormalDeviate();

		/* Flip a biased coin - true if heads */
		int Flip(float prob);

		/* Fetch a single random number between 0.0 and 1.0 - Subtractive Method */
		/* See Knuth, D. (1969), v. 2 for details */
		/* name changed from random() to avoid library conflicts on some machines*/
		float RandomPerc();

		/* Pick a random integer between low and high */
		int NextInt(int low, int high);

		/* real random number between specified limits */
		float NextFloat(float lo ,float hi);

		/* normal noise with specified mean & std dev: mu & sigma */
		double Noise(double mu,double sigma);
	};
}
#endif