Addition of histograms from different files with the same name

[dastudillo]

How to add histograms

I am trying to use void TH1::Add(const TH1 *M_LQ1, const TH1 *M_LQ2, Double_t c1, Double_t c2) and I get: ./upload.Cxx: line 1: syntax blunders close to surprising token (’ ./upload.Cxx: line 1:void TH1::Add(const TH1 *M_LQ1, const TH1 *M_LQ2, Double_t c1, Double_t c2)’ upload.Cxx is my record, it’s miles in my ~/public, if you may check: /afs/cern.Ch/person/e/evgenia/public Thanks.