mysql循环获取结果集

do
{
MYSQL_RES* res = mysql_store_result(con);
if (i++ == 0)
{
MYSQL_ROW row;
if (row = mysql_fetch_row(res))
{
int ret = atoi(row[0]);
if (ret != 0)
{
r = e_asc_errorcode::e_asc_errorcode_registe_already;
}
else
{
ret_user_id = atoi(row[1]);
}
}
else
{
r = e_asc_errorcode_unkown_error;
}
}
mysql_free_result(res);
} while (!mysql_next_result(con));