Hi,
can someone explain this behaviour:
root [62] float sum=0.
root [63] float s=0.
root [64] for(int ll=1; ll<101; ll++){s=h02->GetBinContent(ll);sum=sum+s;};
root [65] sum
(float)1.00000011920928955e+00 !!!!!!!!!!!!!!!!!
root [66] sum=0.
(const double)0.00000000000000000e+00
root [67] for(int ll=1; ll<101; ll++){sum+=h02->GetBinContent(ll);};
root [68] sum
(float)3.94031524658203125e-01 ?????????????????
The first answer is correct, the second is not, it's the content of the
first bin. h02 is the name of some histogram.
Using Root Version 3.01/06 13 September 2001
Cheers,
Birger
------------------------------------------------------------
Birger Koblitz koblitz@mail.desy.de ("-/")_.-'"-._
MPI für Physik . . ; -._ )-;-,_)
c/o DESY-FH1 Tel. (40) 8998-3971 (v_,)' _ )-.\ -'
Notkestr. 85 _.- _..-_/ / ((.'
D-22603 HAMBURG ((,.-' ((,/
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