28 Sep This assignment is an exercise in creating a “wrapper” class. A wrapper class is implemented by using a composition relationship and exporting only those functionalities required by the design

Introduction

The Object Oriented software model provides for both inheritance and composition

techniques for program design. Each has its advantages and disadvantages.

 

Assignment Description

This assignment is an exercise in creating a “wrapper” class. A wrapper class is

implemented by using a composition relationship and exporting only those functionalities

required by the design. In contrast, with inheritance all public members of the base class

are exported for use. Hence the composition relationship provides the means to customize

the behavior of the class object, and at the same time leverage the capabilities of the

already existing contained class.

 

In particular, this assignment creates a wrapper around the deque template class. Rather

than generalizing, which is the way we create reusable code, we will specialize and create

a list class containing strings. In practice storing and manipulating strings dominates

much of what is done by applications.

 

Program Requirements

1. The student will create the implementation for a class called SList. The interface for

the SList class will be provided with all applicable method declarations.

2. The student will create the implementation for the associated enumerator called

SListEnum, which is also declared in the file SList.h.

3. Each of the methods for both class and enumerator will be implemented using

“inline” functions. These inline functions will be included in the SList.h file.

4. The student will create a test driver to test each of the methods defined in the class.

The test driver file will be called TestSList.cpp.

5. The student will submit the source file for the test driver, TestSList.cpp, and the

SList.h file.

6. The student will “zip” only the source files for submission. The name of the zip file

will be “program1_studentlastname.zip”.

 

 

 

 

 

#ifndef SLIST_H_

#define SLIST_H_

 

#include

#include

 

class SListEnum;

 

class SList

{

public:

 

SList();

SList(const char* filename);

SList(const SList& L);

~SList();

 

const char* Add (const char*);

const char* Add (const std::string&);

SList& Move (SList& L,bool append=false);

void Sort (bool nodup=false); void Unique (); void Empty ();

SList* Split (const char* ,const char* delimiter);

const char* Join (std::string&,const char* delimiter); const char* Has (const char*);

void Read (const char* filename);

void Write (const char* filename);

bool operator==(SList&);

bool operator!=(SList&); SList& operator= (SList&);

SList& operator<<(const char* item);

friend class SListEnum;

 

const int count;

private: std::deque strlist;

}; //End of class SList

class SListEnum { public:

SListEnum (); SListEnum (SList& L);

SListEnum (SList* L);

~SListEnum();

void operator=(const SList& L);

void operator=(const SList* L);

void operator=(const SListEnum&);

 

bool hasMore();

const char* getNext();

 

private:

 

};

 

// IMPLEMENTATION GOES HERE

#endif