completato binary tree e implementato euler tour astratto + una sua implementazione per computazione aritmetica

euler_tour/expressions/ExpressionOperator.java

@@ -0,0 +1,17 @@
+package euler_tour.expressions;
+
+/**
+ * Created with MONSTER.
+ * User: xgiovio
+ * Date: 27/04/2014
+ * Time: 13:07
+ */
+public class ExpressionOperator extends ExpressionTerm {
+
+    protected Integer firstOperand, secondOperand;
+    public void setOperands(Integer x, Integer y) {
+        firstOperand = x;
+        secondOperand = y;
+    }
+
+}