... are used to store vectors of elements in an inheritance hierarchy, not for linkedstructures.Chapter 9, which covers getline, string streams, and overloaded operators, andChapter 10 on recursion, ... Recursion 45810.2Recursion and Directories 46010.2.1Classes for Traversing Directories 46110.2.2Recursion and Directory Traversal 46210.2.3Properties of Recursive Functions 46810.3Comparing ... walkdesign.cpp 585Program 12.4: frogwalk3.cpp 588Program 12.5: strlink.cpp 598Program 12.6: orderedlist.cpp 605Program 12.7: listremove.cpp 608Program 12.8: linkstringsetiterator.h 617Program 12.9:...