cpp mysql ubuntu

sudo apt-get install libmysqlcppconn-dev

//MySQLHelper.h 
#include <iostream>
#include <mysql_connection.h>
#include <mysql_driver.h>
#include <mysql_error.h>
#include <mysql_connection.h>
#include <cppconn/driver.h>
#include <cppconn/connection.h>
#include <cppconn/statement.h>
#include <cppconn/resultset.h>
#include <cppconn/exception.h>
#include <cppconn/prepared_statement.h>

using namespace std;
class MySQLHelper
{
public:
    void mySqlConnectDemo()
    {
        try
        {
            sql::Driver *driver;
            sql::Connection *conn;
            sql::Statement *stmt;
            sql::ResultSet *res;
            sql::ResultSetMetaData *resMeta;
            sql::PreparedStatement *pstmt;

            driver = get_driver_instance();
            conn = driver->connect("tcp://127.0.0.1:3306", "username", "password");
            conn->setSchema("db");

            stmt = conn->createStatement();

            pstmt = conn->prepareStatement("select * from Book");
            res = stmt->executeQuery("select * from Book");
            resMeta=res->getMetaData();
            int fieldsCount=resMeta->getColumnCount();
            while (res->next())
            {
                cout<<res->getInt(1)<<","<<res->getInt64(2)<<","<<res->getString(3)<<","<<res->getString(4)<<","
                <<res->getString(5)<<","<<res->getString(6)<<","<<res->getString(7);
                cout<<endl<<endl;
            }
        }
        catch (const std::exception &e)
        {
            std::cerr << e.what() << 'n';
        }
    }
};

//main.cpp
#include "Model/MySQLHeler.h"

void mySqlHelperDemo()
{
    MySQLHelper mh;
    mh.mySqlConnectDemo();
}

int main(int args, char **argv)
{
    mySqlHelperDemo();
}

g++ -g -std=c++2a -I. *.cpp ./Model/*.cpp -o h1 -ljsoncpp -luuid -lmysqlcppconn