#include <iostream>
#include <fstream>
#include <string>
#include <pqxx/pqxx>

using namespace std;

int main() {
     string connection_inf = "host=127.0.0.1 port=5432 dbname=test user=postgres password=";
     pqxx::connection con(connection_inf);
     pqxx::work wrk(con);
     pqxx::result out = wrk.exec("SELECT * FROM tbl_ip");
     wrk.commit();

}