OUtput file error

Newbie
1

Hello everyone,

I am new using ROOT and we are trying to create a histogram but the output file I want to create (“gaus.root”) is not being created and I can’t figure out why. Help me please.

Here it is the core we are using:

#include<TH1.h>
#include<TFile.h>
#include<TRandom.h>
int main(){
TH1F*h = new TH1F(“hgaus”, “A Gauss Function”, 100,-5.0,5.0);
TRandom rnd;
for (int i=0; i<10000; ++i){
double x= rnd.Gaus(1.5,1.0);
h->Fill(x);
}
TFile outfile(“gaus.root”, “RECREATE”);
h->Write();
outfile.Close();
return 0;
}

Regards.

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ROOT Version: 6.18/04
Platform: Ubuntu 18.04 o 16.04
Compiler: C++

2

How are you running the code? It works for me in the interactive ROOT prompt but note that instead of calling your main function “main”, use the same name as the macro file itself; e.g., if the file is test.C, the function would be

 //...
 int test() {
 // ...

(or do .L whateverfilename.C and then directly run main() ).