TMath.h is not found

Newbie
1

Hello everyone,

everytime I try to use TMath or TGraph by “include<TMath.h>” the compiler can’t find this package:

ezaldivar@xxxx:~$ g++ -o tarea4 ./tarea4_1.C
./tarea4_1.C:1:10: fatal error: TMath.h: No such file or directory
    1 | #include <TMath.h>
      |          ^~~~~~~~~
compilation terminated.

I am running root 6.14/02 on a ubuntu 20.04.2 on WSL, and I had a lot of trouble with the installation. I wonder if there lies the problem.

Cheers,
Emiliano.

2 
`root-config --cxx --cflags` -o tarea4 tarea4_1.C `root-config --libs`
3

hello! could you elaborate on that please? I ran the commands as they are and following appeared:

./tarea4_1.C: In function ‘void tarea4_1()’:
./tarea4_1.C:8:1: error: ‘TFile’ was not declared in this scope
    8 | TFile *file = TFile::Open("$PATH/tdscaler_run009776_00692.root");
      | ^~~~~
./tarea4_1.C:8:8: error: ‘file’ was not declared in this scope
    8 | TFile *file = TFile::Open("$PATH/tdscaler_run009776_00692.root");
      |        ^~~~
./tarea4_1.C:8:15: error: ‘TFile’ is not a class, namespace, or enumeration
    8 | TFile *file = TFile::Open("$PATH/tdscaler_run009776_00692.root");
      |               ^~~~~
./tarea4_1.C:9:1: error: ‘TTree’ was not declared in this scope
    9 | TTree *arbol = (TTree*) file->Get("XCDF");
      | ^~~~~
./tarea4_1.C:9:8: error: ‘arbol’ was not declared in this scope
    9 | TTree *arbol = (TTree*) file->Get("XCDF");
      |        ^~~~~
./tarea4_1.C:9:23: error: expected primary-expression before ‘)’ token
    9 | TTree *arbol = (TTree*) file->Get("XCDF");

The program I’m trying to run looks like this:

#include <TMath.h>
#include <iostream>

using namespace std;

void tarea4_1()
{
TFile *file = TFile::Open("$PATH/tdscaler_run009776_00692.root");
TTree *arbol = (TTree*) file->Get("XCDF");
Int_t entradas = arbol->GetEntries();

Int_t Canales = 1200;
UInt_t channelIDInfo[Canales];
arbol->SetBranchAddress("scaler.channelID", channelIDInfo);

cout << "looping..." << endl;

for(Int_t i=0; i<entradas; i++)
  {
    arbol->GetEntry(i);
  }
}

I see TMath.h is present on ~rootbuild/include, but I wouldn’t know how to tell the compiler that it is there. Very appreciated anyways.

Cheers,
Emiliano.

4

Obviously, missing :

#include "TFile.h"
#include "TTree.h"