char* GetDoubleStr(double value)

{

	char buf[32]={0};//长度可以自定义

	sprintf(buf,"%.8f",value);//保留8位小数，不够补0

	int index = 0;

	int len = strlen(buf);

	for(int i = len-1;i>0;i--)

	{

		if(buf[i] == '0')

			continue;

		else

		{

			if(buf[i] == '.') index = i;

			else index = i+1;

			break;

		}

	}

	buf[index] = '\0';

	return buf;

}