I have successfully run my code and generated the root file, but why do I get the following error when I use the data->Print() command?

[JOKER]

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ROOT Version: ROOT 6.26/10
Platform: Ubuntu

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My code is as follows

#include <iostream>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <TFile.h>
#include <TTree.h>
#include <TROOT.h>
#include <TChain.h>
#include <TSelector.h>
#include <TMath.h>
#include <TBenchmark.h>
#include <TF1.h>
#include <TObjArray.h>
#include <TCutG.h>
int ana(){




 //========================= loading DCR-parameter
 //========================= DCR-file
 

 string DCRfileName = "14_964_1_PA1706-585.txt";
 string DCRFile = "14_964_1_PA1706-585";

 TFile *juno = new TFile((DCRFile+".root").c_str(),"recreate");
 TTree *data = new TTree("data","Experiment data");
 printf("-----loading DCR-file : %s. \n", DCRfileName.c_str());
 ifstream file;
 int i=0;
 double DCR,Voltage;
 vector<int>volt;//default voltage
 vector<double>dcr;
 volt.resize(500);

 file.open(DCRfileName.c_str());
 if( file.is_open() )
 {
    int a;

    while( file >> a )
    {
        //dcr[i] = a;
        dcr.push_back(a);

        i = i+1;
    }
    
   printf("..done \n"); 
 }
 else{ printf("...fail open \n"); }
 for(int v =0;v<dcr.size();v++)
 {
    volt[v] =2000;
 }
 file.close();
 //========================Create root file



 data->Branch("DCR", &DCR, "DCR/D");
 data->Branch("Voltage", &Voltage, "voltage/I" );
 //data->Branch("date",);
 //data->Branch("time",);
 for(int number = 0; number < dcr.size();number++)
 {
    DCR = dcr[number];
    Voltage = volt[number];
    data->Fill();
 }
   data ->Write();
   juno ->Close();
   printf("------Finish!!!! \n");

   return 0;
}

Here’s the message.

Attaching file 14_964_1_PA1706-585.root as _file0...
(TFile *) 0x564673c27920
root [1] data->Print()
ROOT_prompt_1:1:1: error: reference to overloaded function could not be resolved; did you mean to call it?
data->Print()
^~~~
/usr/include/c++/11/bits/range_access.h:290:5: note: possible target for call
    data(_Container& __cont) noexcept(noexcept(__cont.data()))
    ^
/usr/include/c++/11/bits/range_access.h:300:5: note: possible target for call
    data(const _Container& __cont) noexcept(noexcept(__cont.data()))
    ^
/usr/include/c++/11/bits/range_access.h:310:5: note: possible target for call
    data(_Tp (&__array)[_Nm]) noexcept
    ^
/usr/include/c++/11/bits/range_access.h:319:5: note: possible target for call
    data(initializer_list<_Tp> __il) noexcept

[couet]

data is used in the std namespace. Try:

 % root
root [0] TFile *f = TFile::Open("14_964_1_PA1706-585.root")
(TFile *) 0x7f7c4eb6d5e0
root [1] TTree *d = (TTree *)f->Get("data");
root [2] d->Print()
******************************************************************************
*Tree    :data      : Experiment data                                        *
*Entries :        0 : Total =            1349 bytes  File  Size =        411 *
*        :          : Tree compression factor =   1.00                       *
******************************************************************************
*Br    0 :DCR       : DCR/D                                                  *
*Entries :        0 : Total  Size=        485 bytes  One basket in memory    *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
*Br    1 :Voltage   : voltage/I                                              *
*Entries :        0 : Total  Size=        493 bytes  One basket in memory    *
*Baskets :        0 : Basket Size=      32000 bytes  Compression=   1.00     *
*............................................................................*
root [3]