#include "TH1.h"
#include <iostream>
#include <string>
#include <vector>

int main() {
	std::vector<TH1F> HistList;
	std::vector<std::string> HistName{"a","b","c","d","e"};
	for (auto name: HistName) {
		TH1F hist(name.c_str(),"test",100,-3,3);
		hist.FillRandom("gaus",10000);
		HistList.push_back(hist);
	}

	std::vector<TH1F*>  HistPtrList;
	for (auto hist: HistList) {
		HistPtrList.push_back(&hist);
		std::cout << hist.GetMaximumBin() << std::endl; // It gives the correct number
	}

	for (auto histptr: HistPtrList) {
		std::cout << histptr->GetMaximumBin() << std::endl; // It gives some random huge number and it seems that the histograms are not there anymore.
	}
}