random.h

用C++实现银行的模拟

class random
{
public:
	random();
	random(unsigned short initialtime);
	unsigned short randomInteger();
	double randomReal();
	double between(double low,double high);
	int between(int low,int high);
private:
	unsigned short seed;
};
random::random()
{
	seed=48611;
}
random::random(unsigned short initialSeed)
{
	seed=initialSeed;
}
unsigned short random::randomInteger()
{
	const long multiplier=44449;
	const long adder=649801;
	seed=(multiplier*time+adder)%31637687;
	return seed;
}
double random::randomReal()
{
	double dseed=randomInteger();
	return dseed/65536.0;
}
double random::between(double low,double high)
{
	return low+(high-low)*randomReal();
}
int random::between(int low,int high)
{
	return low+randomInteger()%(high-low+1);
}