and now some Packets...

{

// load the shared library

gSystem->Load("$EVT_LIB/libEvent.so");

// make a event iterator which reads from a testEventiterator

Eventiterator *it = new testEventiterator();

// e is pointer to an object of type "Event"

Event *e;

// now we create a histogram and set some display properties here.

TH1F *h = new TH1F("histogram","Channel 0", 101,-49.5,49.5);

// now we read 1000 events or until the iterator is empty, whatever comes

// first. For each event we have it identify itself and then we delete it again.

int i = 1000;

while (i-- && (e = it->getNextEvent()) )

{

Packet *p = e->getPacket(1003);

if (p)

{

h->Fill (p->iValue(0));

delete p;

}

delete e;

}

h->Draw();

delete xx;

}

Event objects are nice, but we want to get at the stuff inside (the Packets and their contents).

This example is actually running inside ROOT.

And that’s the result.