#ifndef RANDOM
#define RANDOM
//隨機(jī)數(shù)產(chǎn)生類random
class random
{
public:
	random();//空構(gòu)造函數(shù)
	random(unsigned short initialSeed);//帶參構(gòu)造
	unsigned  short randomInterger();//種子seed產(chǎn)生函數(shù)
	double randomReal();//雙精度數(shù)產(chǎn)生函數(shù)
	double between(double  low ,double high);//范圍隨機(jī)數(shù)產(chǎn)生函數(shù)（double型）
	int between(int low,int high);//范圍隨機(jī)數(shù)產(chǎn)生函數(shù)（int型）
private:
	unsigned short seed;
};
//以下函數(shù)實(shí)現(xiàn)
random::random()
{
	seed=48611;
}
unsigned short random::randomInterger()
{
	const long multiplier=44449;
	const long adder=649801;
	seed=(multiplier*seed+adder)%31637687;
	return seed;
}
double random::randomReal()
{
	double dseed=randomInterger();
	return dseed/65536.0;
}
double random::between(double low,double high)
{
	return low+(high-low)*randomReal();
}
int random::between(int low, int high)//隨機(jī)數(shù)產(chǎn)生函數(shù)between...
{
	return low+randomInterger()%(high-low+1);
}
#endif