diff -r 000000000000 -r 2f259fa3e83a ode/inc/set.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ode/inc/set.h	Tue Feb 02 01:00:49 2010 +0200
@@ -0,0 +1,56 @@
+#ifndef SET_H_
+#define SET_H_
+
+typedef class pair pair;
+typedef class iterator iterator;
+
+#define MAX 50
+
+
+
+class set
+{
+   private:
+		int n; 
+		pair* el;
+   public:
+		set(); //constructor
+		int addElem(pair e);  //adds the specified pair to this set
+		int delElem(pair e); //removes the specified pair from this set
+		int belongs(pair e); // returns true if this set contains the e pair.
+		int length(); //returns the number of pairs in this set
+    	int isEmpty(); //returns true if this set contains no pairs.
+		pair getElem(int i); //returns the i-th pair 
+		iterator* setIterator(); //returns an iterator over the pairs in this set.
+		~set(); //destructor
+};
+
+class iterator
+{
+	private:         
+		set* s;
+  		int current; //current refers the current pair
+	public:
+    	iterator(set* sc); //constructor
+   		~iterator(); //destructor
+    	pair getElem(); //returns  the current pair 
+    	int hasNext(); //returns true if the iteration has more pairs.
+		void next(); // moves the current to the next pair
+    	void setToFirst(); // first pair is current
+};
+
+class pair
+{
+	private:
+		int anum1;
+		int anum2;
+	public:
+		pair();
+		pair(int num1, int num2);
+		~pair();
+		int getNum1();
+		int getNum2();
+};
+
+
+#endif /*SET_H_*/