From b7a6d9d18945e81ba9c23cf90b41328e20ba1341 Mon Sep 17 00:00:00 2001
From: Haidong Ji
Date: Sun, 19 Aug 2018 11:08:59 -0500
Subject: GCD done!

---
 AlgoDesignAndTechniqueEdxPython/sources/gcd.py   | 19 +++++++++++++++++++
 AlgoDesignAndTechniqueEdxPython/tests/gcdTest.py | 24 ++++++++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 AlgoDesignAndTechniqueEdxPython/sources/gcd.py
 create mode 100644 AlgoDesignAndTechniqueEdxPython/tests/gcdTest.py

diff --git a/AlgoDesignAndTechniqueEdxPython/sources/gcd.py b/AlgoDesignAndTechniqueEdxPython/sources/gcd.py
new file mode 100644
index 0000000..7b107cd
--- /dev/null
+++ b/AlgoDesignAndTechniqueEdxPython/sources/gcd.py
@@ -0,0 +1,19 @@
+# Uses python3
+import sys
+
+
+def getGCD(a, b):
+	if b == 0:
+			return a
+	if b > a:
+		return getGCD(b, a)
+	else:
+		return getGCD(b, a % b)
+
+
+if __name__ == '__main__':
+    entryNumbers = sys.stdin.read()
+    tokens = entryNumbers.split()
+    a = int(tokens[0])
+    b = int(tokens[1])
+    print(getGCD(a, b))
diff --git a/AlgoDesignAndTechniqueEdxPython/tests/gcdTest.py b/AlgoDesignAndTechniqueEdxPython/tests/gcdTest.py
new file mode 100644
index 0000000..a41b49e
--- /dev/null
+++ b/AlgoDesignAndTechniqueEdxPython/tests/gcdTest.py
@@ -0,0 +1,24 @@
+'''
+Created on Aug 19, 2018
+
+@author: haidong
+'''
+import unittest
+
+from sources.gcd import getGCD
+
+class Test(unittest.TestCase):
+
+
+    def testName(self):
+        self.assertEqual(1, getGCD(18, 35))
+        self.assertEqual(17657, getGCD(28851538, 1183019))
+        self.assertEqual(7, getGCD(1344, 217))
+        self.assertEqual(1344, getGCD(1344, 1344))
+        self.assertEqual(4, getGCD(14159572, 63967072))
+        self.assertEqual(4, getGCD(63967072,14159572))
+
+
+if __name__ == "__main__":
+    #import sys;sys.argv = ['', 'Test.testName']
+    unittest.main()
\ No newline at end of file
-- 
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