Matlab language to C

Why this functions doesn't work on matlab coder

function [Rs] = Racineb(s)

imax=25;

emax=0.00001;

x=s;

if s<0

 Rs='erreur';

 disp('le paramètre entrée s doit être positif')

end

for i=1:imax

 Rs=x-(x^2-s)/(2*x);

 E=abs((Rs-x)/x);

 x=Rs;

 if E<emax

 break

 end

end

if E>emax

    Rs='erreur';

disp('Le nombre de 25 itération a ete atteint sans avoir trouvé la solution')

end

It is saying that this assignment writes a 'double' value into a 'char' type. The problem is with Rs and x.

How can I resolve this problem? Thank you

Answer 1

[Sean de Wolski]

Don't convert Rs to a char!

Rs is a double here:

Rs=x-(x^2-s)/(2*x);

Here you convert it to a char.

    Rs='erreur';

Use a different variable instead or set Rs to nan.