Trouble with viewing a tree and its branch

ROOT
1

hello,
i am trying to create a tree with a branch that contains a single object as follows:

#include <stdio.h>
#include
#include “TFile.h”
#include “TTree.h”

using namespace std;

int littlerTest()
{
typedef struct ROCDelay25Branch{
float pass;
float suggestedDelaySetting;
float rocName;
};

TFile myFile(“treeTest.root”,“RECREATE”);

ROCDelay25Branch *theBranch = 0;
TTree *tree = new TTree(“LevelSummary”, “canichangethis?”);
tree->Branch(“ROC Summary”, &theBranch, “pass/F:suggestedDelaySetting/F:rocName/F”);
theBranch = new ROCDelay25Branch;
theBranch->pass = 23.23;
theBranch->suggestedDelaySetting = 3.14159;
theBranch->rocName = 217.712;
tree->Fill();

myFile.Write();
myFile.Close();

delete theBranch;

return 0;
}

after executing the code, i open a TBroswer to view the values saved into the branch of the tree. when i click on any of the leafs, the root terminal outputs:
Error in TTreeFormula::Compile: Bad numerical expression : “ROCSummary.pass”

clearly i am doing something wrong, but i don’t see where my mistake is. can someone give me a hand?
thanks,
james

2

Move the definition of the struct outside the main function and show the changes below

Rene

[code]#include <stdio.h>
#include
#include “TFile.h”
#include “TTree.h”

using namespace std;

typedef struct ROCDelay25Branch{
float pass;
float suggestedDelaySetting;
float rocName;
};

int littlerTest() {

TFile myFile(“treeTest.root”,“RECREATE”);

ROCDelay25Branch *theBranch = 0;
TTree *tree = new TTree(“LevelSummary”, “canichangethis?”);
tree->Branch(“ROC Summary”,“ROCDelay25Branch”, &theBranch);
theBranch = new ROCDelay25Branch;
theBranch->pass = 23.23;
theBranch->suggestedDelaySetting = 3.14159;
theBranch->rocName = 217.712;
tree->Fill();
myFile.Write();
myFile.Close();

delete theBranch;

return 0;
}
[/code]

3

the problem was associated with a space in the branch name.