Steve and Rene,
The limitation is obvious that there is a function definition in { }
style macro. There are 2 kinds of macros in ROOT/CINT. C++ style
macro accepts function definition, however { } style macro does not.
Problem is that you have extra { } outside. if ROOT/CINT sees '{' as
the first non-comment character in a file, it is interpreted as { }
style macro. If you take out { } , it will work fine.
Thank you
Masaharu Goto
=======================================================================
Hi Steve,
Again, you show only a subset of your code.
Your function is correct. My guess is that this function is embedded
into a piece of code following the function calling it. In this case
you must define a function prototype at the beginning of your macro.
See example of an FCN function for TMinuit in
$ROOTSYS/test/minexam.cxx
Rene Brun
Steve Udriot wrote:
>
> Good morning,
>
> Concerning the "limitation" problem is attached here a macro which
> defines a function from the "Example of a Program to fit non-equidistant
> data points".
> Note that the "limitation" problem disappears when I define the function
> "extern", but this should not be a proper solution...
>
> I hope You will help me out of this!
>
> A nice day to everybody,
>
> Steve
>
> ------------------------------------------------------------------------
> {
>
> Float_t z[5],x[5],y[5],errorz[5];
>
>
//____________________________________________________________________________
_
_
> void fcn(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag
)
> {
> const Int_t nbins = 5;
> Int_t i;
>
> //calculate chisquare
> Double_t chisq = 0;
> Double_t delta;
> for (i=0;i<nbins; i++) {
> delta = (z[i]-func(x[i],y[i],par))/errorz[i];
> chisq += delta*delta;
> }
> f = chisq;
> }
>
> }
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