FillHistoCharge.C

#include "TICPhysics.h"
#include <TChain.h>
#include <regex>
TChain* chain;

/////////////////////////////////////////////////////////////////
void FillHistoCharge( const char *Path){

    chain = new TChain("PhysicsTree");
    chain->Add(Path);

    TICPhysics* IC = new TICPhysics() ;
    chain->SetBranchStatus("IC", true);
    chain->SetBranchAddress("IC", &IC); 


    double FF_IC_X;
    chain->SetBranchStatus("FF_IC_X", true);
    chain->SetBranchAddress("FF_IC_X", &FF_IC_X);


    TH1F *hChargeAll = new TH1F("hcharge_all","hcharge_all",2000,20,80);

    int Nentries = chain->GetEntries();
    auto start = std::chrono::high_resolution_clock::now();

    for (int e = 0; e < Nentries; e++) {
        if (e % 100000  == 0 && e > 0 ) {
            auto now = std::chrono::high_resolution_clock::now();
            std::chrono::duration<double> elapsed = now - start;
            double avgTimePerIteration = elapsed.count() / e;
            double timeLeft = avgTimePerIteration * (Nentries - e);

            std::cout << "********** Estimated time left: " << int(timeLeft) << " seconds **********" << "\r" << flush;
        }

        chain->GetEntry(e);

        if(FF_IC_X>-530 ){
            hChargeAll->Fill(IC->Chio_Z);
        }
    }

    std::string strPath(Path);    
    std::regex pattern("Run(\\d{3})");  // Regex to match Run followed by exactly 3 digits
    std::smatch matches;

    if (std::regex_search(strPath, matches, pattern)) {
        std::string number = matches[1];  // Extract the number
        std::string fileName = "Output/histo_charge_" + number + ".root";  // Generate the filename

        // Create the TFile
        TFile* file = new TFile(fileName.c_str(), "RECREATE");
        if (file->IsOpen()) {
            std::cout << "File created: " << fileName << std::endl;
        } else {
            std::cout << "Failed to create the file." << std::endl;
        }

        hChargeAll->Write();
        // Don't forget to close the file
        file->Close();
    } else {
        std::cout << "Pattern not found!" << std::endl;
    }
}