Added examples for Nit to samples.

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>

samples/Nit/procedural_array.nit

@@ -0,0 +1,48 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2004-2008 Jean Privat <jean@pryen.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A procedural program (without explicit class definition).
+# This program manipulates arrays of integers.
+module procedural_array
+
+# The sum of the elements of `a'.
+# Uses a 'for' control structure.
+fun array_sum(a: Array[Int]): Int
+do
+	var sum = 0
+	for i in a do
+		sum = sum + i
+	end
+	return sum
+end
+
+# The sum of the elements of `a' (alternative version).
+# Uses a 'while' control structure.
+fun array_sum_alt(a: Array[Int]): Int
+do
+	var sum = 0
+	var i = 0
+	while i < a.length do
+		sum = sum + a[i]
+		i = i + 1
+	end
+	return sum
+end
+
+# The main part of the program.
+var a = [10, 5, 8, 9]
+print(array_sum(a))
+print(array_sum_alt(a))