examples/procedural_array.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2004-2008 Jean Privat <jean@pryen.org>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Example of a procedural program (without explicit class definition).
  18 # This program manipulates arrays of integers.
  19 module procedural_array is example
  20
  21 # The sum of the elements of `a'.
  22 # Uses a 'for' control structure.
  23 fun array_sum(a: Array[Int]): Int
  24 do
  25         var sum = 0
  26         for i in a do
  27                 sum = sum + i
  28         end
  29         return sum
  30 end
  31
  32 # The sum of the elements of `a' (alternative version).
  33 # Uses a 'while' control structure.
  34 fun array_sum_alt(a: Array[Int]): Int
  35 do
  36         var sum = 0
  37         var i = 0
  38         while i < a.length do
  39                 sum = sum + a[i]
  40                 i = i + 1
  41         end
  42         return sum
  43 end
  44
  45 # The main part of the program.
  46 var a = [10, 5, 8, 9]
  47 print(array_sum(a))
  48 print(array_sum_alt(a))