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c Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
c Copyright (C) ????-2008 - INRIA
c
c This file must be used under the terms of the CeCILL.
c This source file is licensed as described in the file COPYING, which
c you should have received as part of this distribution. The terms
c are also available at
c http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
subroutine idegre(a,majo,nvrai)
c!but
c calcul du degre d un polynome
c!liste d'appel
c a=coeff par ordre croissant
c majo=majorant
c nvrai=degre calcule
c!
dimension a(*)
double precision a,test,dasum,an
c
an=dasum(majo+1,a,1)
if(an.eq.0.0d+0) goto 20
if(majo.eq.0) goto 20
do 10 k=1,majo+1
kk=majo+2-k
test=abs(a(kk))/an
if(1.0d+0+test.ne.1.0d+0) then
nvrai=kk-1
return
endif
10 continue
20 nvrai=0
return
end
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