Computer Science City College of New York
CSc21200 Data Structures
Programming Assignment 2:
Implement and Test the sequence Class Using a Fixed-Sized Array (Chapter 3)
Modified from projects of Chapter 3 at
www.cs.colorado.edu/~main/projects/
of Data Structures and Other Objects Using C++ by Michael Main
and Walter Savitch
- The Assignment:
- You will implement and test the sequence class using an array
to
store the sequence's items.
- Purposes:
- Ensure that you can write a small class that uses an array as
a
private member variable.
- Familiarize yourself with the sequence container class (which
may
also be part of future assignments).
- Give us a chance to evaluate your programming skills on a
small
class.
- Before Starting:
- Read all of Chapter 3.
- Due Date:
- Thursday, October 7, 2021 before midnight.
Late work may be submitted through Saturday with 10% penalty per day.
No work will be accepted after Saturday.
- How to Turn In:
- Please follow the instructions here.
- Files that you must write:
- sequence1.h: The header file for the sequence
class.
Actually, you don't have to write much of this file. Just start with
our version and add your name and other
information at the top. Also, decide on appropriate private member
variables, an declare these in the sequence class definition at the
bottom of the header file.
If some of your member functions are implemented as inline functions,
then you may put those implementations in this file too.
- sequence1.cpp: The implementation file for this
first sequence class. You will write all of this file, which will
have the implementations of all the sequence's member functions.
- Other files that you may find helpful:
- sequence_test.cpp
A simple interactive test program.
- sequence_exam.cpp:
A non-interactive test program that will be used to grade the correctness
of your sequence class.
The sequence Class Using a Fixed-Sized Array
Discussion of the Assignment
Many of the features of this class are similar to the bag
class
from Section 3.1, so start by thoroughly reading Section 3.1 and pay
attention to new features such as static constant members
and
the use of a typedef. The sequence class itself is discussed
in
Section 3.2 of the class text. Notice how the sequence differs from
a
bag (see page 119). The interactive test program sequence_exam.cpp is
discussed in Section 3.3 of the class text.
Start by declaring the sequence's private member variables in
sequence.h. Then write the invariant of your ADT at the top of
sequence1.cpp. The invariant describes precisely how all of your
private member variables are used. All of the member functions
(except for the constructor) may count on the invariant being true when
the member function is activated. And all of the member functions are
responsible for ensuring that the invariant is true when the function returns.
As always, do your work in small pieces. For example, my first
version of the sequence had only a constructor, start, insert, advance,
and current. My other member functions started out as stubs.
Use the interactive test program and a debugger to track down errors
in your implementation. If you have an error, do not start making
changes until you have identified the cause of the error.
The ability to initialize and use a static member constant within
the class definition is a relatively new feature. If you have an older
compiler that does not support static const members, then you may use
enum {CAPACITY = 30};
instead of
static const size_type CAPACITY = 30;
After this definition, the name bag::CAPACITY is defined to have the
integer value 30. Although this is not the intended use of an
enum definition, the result is the same as using a static member
constant (see more discussions on page 99 in the textbook).
George Wolberg
( wolberg@ccny.cuny.edu ),
Fall 2021