#include <iostream>
#include <pqxx/pqxx>

int main() {
    try {
        pqxx::connection c{"dbname=your_db user=your_user password=your_pass host=localhost"};
        pqxx::work txn{c};
        pqxx::result r = txn.exec("SELECT version();");
        for (auto row : r) {
            std::cout << row[0].c_str() << std::endl;
        }
    } catch (const std::exception &e) {
        std::cerr << "PostgreSQL error: " << e.what() << std::endl;
        return 1;
    }
    return 0;
}