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- -- This file is part of SmallEiffel The GNU Eiffel Compiler.
- -- Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
- -- Dominique COLNET and Suzanne COLLIN - colnet@loria.fr
- -- http://www.loria.fr/SmallEiffel
- -- SmallEiffel is free software; you can redistribute it and/or modify it
- -- under the terms of the GNU General Public License as published by the Free
- -- Software Foundation; either version 2, or (at your option) any later
- -- version. SmallEiffel is distributed in the hope that it will be useful,but
- -- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- -- for more details. You should have received a copy of the GNU General
- -- Public License along with SmallEiffel; see the file COPYING. If not,
- -- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- -- Boston, MA 02111-1307, USA.
- --
- class FIBONACCI
-
- creation make
-
- feature
-
- make is
- do
- if argument_count /= 1 or else
- not argument(1).is_integer
- then
- io.put_string("Usage: ");
- io.put_string(argument(0));
- io.put_string(" <Integer_value>%N");
- die_with_code(exit_failure_code);
- end;
- io.put_integer(fibonacci(argument(1).to_integer));
- io.put_new_line;
- end;
-
- fibonacci(i: INTEGER): INTEGER is
- require
- i >= 0
- do
- if i = 0 then
- Result := 1;
- elseif i = 1 then
- Result := 1;
- else
- Result := fibonacci(i - 1) + fibonacci(i - 2) ;
- end;
- end;
-
- end
-
-