Function tbl_create

lib_acl_cpp/samples/mysql/mysql.cpp:25–37

static const char* __pre = "���";

static bool tbl_create(acl::db_handle& db)
{
	if (db.tbl_exists("group_tbl")) {
		printf("table exist\r\n");
		return true;
	} else if (db.sql_update(CREATE_TBL) == false) {
		printf("sql error\r\n");
		return false;
	} else {
		printf("create table ok\r\n");
		return true;
	}
}

// ���ӱ�����
static bool tbl_insert(acl::db_handle& db, int n)