lewaimai_pos_windows/lewaimai_pos_windows_server/helper/CRandomHelper.h

#pragma once

class CRandomHelper
{
public:
	CRandomHelper();
	~CRandomHelper();

	CRandomHelper(unsigned int seed)
	{
		next_seed = seed;
	}

	//生成0到1之间的随机数
	inline double lewaimai_rand()
	{
		return (double)myrand() / 0x7fff;
	}

	//生成范围内的随机整数
	inline int randInt(int begin, int end)
	{
		return begin + (myrand() % (end - begin + 1));
	}

	/* RAND_MAX assumed to be 32767 */
	inline int myrand(void)
	{
		next_seed = next_seed * 1103515245 + 12345;
		return((unsigned)(next_seed / 65536) % 32768);
	}

	inline void mysrand(unsigned int seed)
	{
		next_seed = seed;
	}

private:
	unsigned long next_seed = 1;
};