Rosettacode: Add Bitwise Op.

Close #1488

diff --git a/examples/rosettacode/bitwise_operations.nit b/examples/rosettacode/bitwise_operations.nit
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+++ b/examples/rosettacode/bitwise_operations.nit
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+#!/usr/bin/env nit
+#
+# This file is part of NIT ( http://www.nitlanguage.org ).
+# This program is public domain
+
+# Task: Bitwise operations
+# SEE: <http://rosettacode.org/wiki/Bitwise_operations>
+# Without logical right shift
+module bitwise_operations
+
+fun bitwise(a, b: Int)
+do
+       print "a and b: { a.bin_and(b) }"
+       print "a or b: { a.bin_or(b) }"
+       print "a xor b: { a.bin_xor(b) }"
+       print "not a: { a.bin_not }"
+       print "a << b: { a << b }"
+       print "a >> b: { a >> b }"
+end
+
+if args.length >= 2 then
+       bitwise(args[0].to_i, args[1].to_i)
+else
+       print "Usage : ./bitwise_operations X X"
+end

diff --git a/tests/bitwise_operations.args b/tests/bitwise_operations.args
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+++ b/tests/bitwise_operations.args
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+5 10

diff --git a/tests/sav/bitwise_operations.res b/tests/sav/bitwise_operations.res
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+++ b/tests/sav/bitwise_operations.res
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+Usage : ./bitwise_operations X X

diff --git a/tests/sav/bitwise_operations_args1.res b/tests/sav/bitwise_operations_args1.res
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+++ b/tests/sav/bitwise_operations_args1.res
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+a and b: 0
+a or b: 15
+a xor b: 15
+not a: -6
+a << b: 5120
+a >> b: 0