random.h

来自「离散事件银行业务模拟程序 （C++）实现」· C头文件 代码 · 共 41 行

#ifndef RANDOM
#define RANDOM
//随机数产生类random
class random
{
public:
	random();//空构造函数
	random(unsigned short initialSeed);//带参构造
	unsigned  short randomInterger();//种子seed产生函数
	double randomReal();//双精度数产生函数
	double between(double  low ,double high);//范围随机数产生函数（double型）
	int between(int low,int high);//范围随机数产生函数（int型）
private:
	unsigned short seed;
};
//以下函数实现
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)//随机数产生函数between...
{
	return low+randomInterger()%(high-low+1);
}
#endif