Step 1. Connecting to database (and error handling)

#include <stdio.h>  // for printf#include <SQLAPI.h> // main SQLAPI++ headerint main(int argc, char* argv[]){    SAConnection con; // create connection object        try    {        // connect to database        // in this example it is Oracle,        // but can also be Sybase, Informix, DB2        // SQLServer, InterBase, SQLBase and ODBC        con.Connect(            "test",     // database name            "tester",   // user name            "tester",   // password            SA_Oracle_Client);        printf("We are connected!\n");        // Disconnect is optional        // autodisconnect will ocur in destructor if needed        con.Disconnect();        printf("We are disconnected!\n");    }    catch(SAException &x)    {        // SAConnection::Rollback()        // can also throw an exception        // (if a network error for example),        // we will be ready        try        {            // on error rollback changes            con.Rollback();        }        catch(SAException &)        {        }        // print error message        printf("%s\n", (const char*)x.ErrText());    }        return 0;}