Added class for List type

ListVariable.cpp

@@ -0,0 +1,28 @@
+/*
+ * List.cpp
+ *
+ *  Created on: Apr 25, 2013
+ *      Author: jimtahu
+ */
+
+#include "ListVariable.h"
+
+ListVarable::ListVarable(string name):Variable(name) {
+	this->head=NULL;
+}
+
+void ListVarable::add(string value){
+	ListItem *item = new ListItem();
+	item->value=value;
+	item->next=this->head;
+	this->head=item;
+}
+
+ListVarable::~ListVarable() {
+	ListItem *item = this->head;
+	while(this->head != NULL){
+		this->head=item->next;
+		delete item;
+		item=this->head;
+	}//end while list items
+}

ListVariable.h

@@ -0,0 +1,28 @@
+/*
+ * List.h
+ *
+ *  Created on: Apr 25, 2013
+ *      Author: jimtahu
+ */
+
+#ifndef LIST_H_
+#define LIST_H_
+
+#include "Variable.h"
+
+class ListItem {
+public:
+	string value;
+	ListItem *next;
+public:
+};
+
+class ListVarable: public Variable {
+	ListItem *head;
+public:
+	ListVarable(string name);
+	void add(string value);
+	virtual ~ListVarable();
+};
+
+#endif /* LIST_H_ */

Variable.h

@@ -19,9 +19,9 @@ class Variable {
 public:
 	Variable(string name);
 	Variable(Variable &other);
-	string GetName();
-	string GetValue();
-	void SetValue(string value);
+	virtual string GetName();
+	virtual string GetValue();
+	virtual void SetValue(string value);
 	virtual ~Variable();
 };