Fitting the data isn't showing after potting the graph

Hi everyone,

I am trying to fit the data and it is showing unnecessary bars on the histograms by default. To solve this problem I used QDC1->Draw(“HIST C”) affter QDC1->Fit(“polya”,“R”); but now after uses of this it is not showing any fitting function.

. The files with and without fit function are attached.

root [0] auto h = new TH1F("h","h",100,-4,4)
root [1] h->FillRandom("gaus");

root [2] h->Fit("gaus","C")

 FCN=65.0502 FROM MIGRAD    STATUS=CONVERGED      54 CALLS          55 TOTAL
                     EDM=9.21369e-07    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  Constant     1.57425e+02   2.76819e+00   8.89596e-03  -5.39870e-04
   2  Mean         1.38321e-02   1.43799e-02   5.69927e-05   8.22303e-04
   3  Sigma        1.00178e+00   1.04857e-02   1.11224e-05  -4.31183e-01

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