int ToolFunc::calcRandom(int starNum,int endNum)
{
	int result = 0;
	static int count = 0;
	struct timeval now;
	if(starNum >= endNum)
		return 0;
	gettimeofday(&now,NULL);
	srand(now.tv_usec + count);
	count += 1;
	result = starNum + rand() % (endNum - starNum + 1);
	return result;
}