Complete class to mysql connect and query

++
#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <mysql.h>
using namespace std;
 
int main(int argc, char *argv[])
{
  MYSQL *conn; // mysql connection
  MYSQL_RES *res; //result
  MYSQL_ROW row; // row data
 
  char *server = "localhost";
  char *user = "root";
  char *password = "123456";
  char *database = "mysql";
  conn = mysql_init(NULL); //initialize
  if (!mysql_real_connect(conn, server, user, password, database, 0, NULL, 0)) {
    fprintf(stderr, "%s\n", mysql_error(conn));
    exit(1);
  }
 
  if (mysql_query(conn, "show tables")) {
    fprintf(stderr, "%s\n", mysql_error(conn));
    exit(1);