This technique allows you to delete the contents of a List at the same time you are storing pointers a list. This same approach can be used for maps or vectors.

 #include#includeusing namespace std;//Declaring a class ClassListclass ClassList {public:	ClassList() { cout << "construct an ClassList
"; }	~ClassList() { cout << "destruct an ClassList
"; }};/*A list which takes pointers to the Class ClassList */list listClasses;/*CleanUp function which clears all the contents of the List by calling the Delete function iteratively*/void cleanup(){	list::iterator iteratorList;	iteratorList = listClasses.begin();	while(iteratorList!= listClasses.end())	{		delete (ClassList*)(*iteratorList);		iteratorList++;	}}int main(){//Add the New classes into the List	listClasses.push_back(new ClassList);	listClasses.push_back(new ClassList);	listClasses.push_back(new ClassList);	listClasses.push_back(new ClassList);/*Calling the Clean up method to clear all the contents of the list */  cleanup();}/***This example shows you how to delete the contents of a list by using iterators *****/