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  1. sum_atoms([], []).
  2. sum_atoms([H|T], [HeadSum|RT]) :-
  3.     atom_codes(H, Codes),
  4.     sum_letters(Codes, HeadSum),
  5.     sum_atoms(T, RT).
  6.  
  7. sum_letters([], 0).
  8. sum_letters([H|T], Res) :-
  9.     sum_letters(T, TailSum),
  10.     Res is (H-96) + TailSum.
  11.  
  12. :- sum_atoms([i,am,fine], S), write(S).
Success #stdin #stdout #stderr 0.02s 6160KB
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Standard input is empty
stdout
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[9, 14, 34]
stderr
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Prolog (swi 7.6.4)

					

					

						
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