randomnumber.cpp

来自「随机算法」· C++ 代码 · 共 34 行

// RandomNumber.cpp: implementation of the CRandomNumber class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "RandomNumber.h"
#include "time.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CRandomNumber::CRandomNumber(unsigned long s)
{
	if(s==0)
		randSeed=time(0);
	else
		randSeed=s;
}

CRandomNumber::~CRandomNumber()
{

}

unsigned short CRandomNumber::Random(unsigned long n)
{
	randSeed=multiplier*randSeed+adder;
	return (unsigned short)((randSeed>>16)%n);
}
double CRandomNumber::fRandom(void)
{
	return Random(maxshort)/double(maxshort);
}