Added Euclidean distance calculations

Euclidean.cpp

@@ -0,0 +1,11 @@
+#include "Euclidean.hpp"
+
+double Euclidean::computeDistanceFrom(const Euclidean & euclidian)
+{
+    double diffx = _x - euclidian.getX();
+    double diffy = _y - euclidian.getY();
+    double diffx_sqr = pow(diffx, 2);
+    double diffy_sqr = pow(diffy, 2);
+
+    return sqrt(diffx_sqr + diffy_sqr);
+}