Rename year directories to allow natural ordering

year2/semester2/CT2109/Assignments/Assignment-03/code/Stack.java

@@ -0,0 +1,13 @@
+/** Abstract Stack interface */
+
+public interface Stack 
+{
+	// most important methods
+	public void   push(Object n); // push an object onto top of the stack
+	public Object pop();    	  // pop an object from top of the stack
+
+	// others   
+	public Object  top(); 		  // examine top object on stack without removing it
+	public boolean isEmpty();     // true if stack is empty
+	public boolean isFull();  	  // true if stack is full (if it has limited storage)
+}