Example 9.1. Use a query

  #define HAVE_SSTREAM 1
  #include <hk_classes.h>
  #include <iostream>
  int main()
  {
  hk_drivermanager* mydrivermanager = new hk_drivermanager();
  if (mydrivermanager==NULL) {cout <<"error creating mydrivermanager"<<endl;exit(1);}
  hk_connection* myconnection = mydrivermanager->new_connection();
  if (myconnection==NULL) {cout <<"error creating myconnection"<<endl;exit(1);}
  myconnection->connect();

  hk_database* mydatabase=myconnection->new_database("exampledb");
  if (mydatabase==NULL) {cout <<"error creating mydatabase"<<endl;exit(1);}
  hk_datasource* mydatasource= mydatabase->new_resultquery();
  mydatasource->set_sql("SELECT * FROM literature");
  if (mydatasource==NULL) {cout <<"error creating mydatasource"<<endl;exit(1);}
  mydatasource->enable();
  //the following internal debugging command should not be used. It is used here for
  //demonstration purposes only!!!!
  mydatasource->dump_data(); // DON'T USE THIS COMMAND IN YOUR PROGRAMMS!!!

  delete mydrivermanager;
  }