CS 210 DATA STRUCTURES AND ALGORITHIMS

Fall 2006

CS 210

Instructor Mrs. Sarab Almuhaideb.

Office: W357 Phone: 4535189 Ext.# 711 Email: smuhaideb@pscw.psc.edu.sa

Office Hours: SUN 12:00 – 1:00,MON 9:00 – 10:50, (or by appointment)

CS 210

CS 210 CS 210 : Data Structures and Algorithms. Credit Hours: 3. Prerequisite: CS 102. Course Home Page:

Visit http://www.geocities.com/pscw_cs210 to find course announcements, notes, important dates ,assignments, grades and more.

CS 210

Abstract Data Types

ADT: is the study of classes of objects whose logical behavior is defined by a set

of values and a set of operations.

CS 210

Data Structures

The term Data Structures refers to the study of data and how to present objects

within a program; that is, the implementation of the structured

relationships.

We are now interested in the study of the abstract properties of classes of data objects in addition to how the objects might be represented in a program.

CS 210

It is well known that data structures have a profound effect on the performance of programs and applications. The main purpose of this course is to introduce the main types of data structures and illustrate their use throughout simple examples and applications. In the process, some guidelines and principles for good programming and application development are given.

Course Objectives

CS 210

Text Book

ADT, Data Structures and ADT, Data Structures and Problem Solving with C++, 2Problem Solving with C++, 2ndnd Edition. Edition.

By Larry Nyhoff, By Larry Nyhoff,

Prentice Hall, 2004. Prentice Hall, 2004.

CS 210

Evaluation

Grading: Major 1 20%. Major 2 20%. Assignments 15%. Quizzes 10%. Final 35%.

No make-up exams.

CS 210

Important Dates Major I Exam:

Monday November 8, 2006 [8-10]. Major II Exam:

Monday December 11, 2006 [8-10]. Quizzes:

Quiz 1: Sunday October 1, 2006.Quiz 2: Sunday November 19, 2006.Quiz 3: Sunday December 3, 2006.

Final Exam: During the period Jan 20 – 30, 2007.

CS 210

Course Policy1. There will be weekly tutorial problems as well as bi-weekly programming

projects.2. Students are encouraged to solve the tutorial problems before we do them

together in class, but are NOT required to submit their solutions.3. 15% of your grade will be assigned to PROGRAMMING projects.4. Homework assignments must be done individually( or in pairs as stated in

the project’s requirements). 5. We do not expect to see two programming projects that look identical. In this

case, BOTH projects will be rejected.6. Please note the due date for your programming project.7. Late projects will be grade-penalizes or might not be accepted at all.8. This course adopts the drop-the-lowest policy for assignments and quizzes.9. All source files must be compiled and fully tested by the student before

submission.10. A program that does not compile is not accepted for any reason.11. Also, a program with no output is not accepted. 12. A program must be submitted in both electronic copy (the .cpp file) and hard

copy. 13. Make sure the floppy is labeled with your name and the assignment number.14. If a student was absent in any lecture, then she is expected to read the lecture

material and is welcomed for any specific question she may has.

CS 210

Data Structures

Revision: Classes and Abstract Data Types

Please read notes page for details.Please read notes page for details.

CS 210

Abstraction

Captures essential qualities of an object and names the object.

Ignores implementation details

Is necessary for managing large, complex software projects.

CS 210

Data Hiding

Hides implementation details from user

Prevents user from accessing implementation directly

User must interact with object through an interface.

CS 210

Hierarchical Design- an Example

CIS

Carnet Lab Scheduling Radiology

CT Scan

Patient Registration

X-Ray MRI UltrasoundOrder

Lab Order

Radiology Order

Appointment

Documen-tation

Gen. Lab AP Micro BB

CS 210

Classes in C++

A class is a means of abstraction in C++

A class is a specification of a group of objects that all have the same essential properties and behaviors.

FOR EXAMPLE . . .

CS 210

A class exampleclass

Student

Properties (data members)name, graduation year, list of courses, number of courses

Operations (methods)List CoursesList Student InformationAdd a CourseSet Graduation Date

CS 210

C++ Data Type class represents an ADT

2 kinds of class members: Data members and function members

Class members are private by default

Data members are generally private

Function members are generally declared public

Private class members can be accessed only by the class member functions (and friend functions), not by client code.

CS 210

class type declarationThe class declaration creates a data type

and names the members of the class.

It does not allocate memory for any variables of that type!

Client code still needs to declare class variables.

CS 210

An object is an instance of a class

For example:object

studentAName: Andrea StudentGraduation Year: 2005List of Courses: CSCI262, MATH331Number of courses: 6

CS 210

2 separate files generally used for class type

// SPECIFICATION FILE ( student .h ) // Specifies the data and function members. class Student { public: . . .

private: . . . } ;

// IMPLEMENTATION FILE (student.cpp ) // Implements the Student member functions. . . .

CS 210

Class Student Specification// SPECIFICATION FILE ( student.h )typedef char string9[10];

class Student // declares a class data type{ // does not allocate memory

public : // 5 public function membersvoid AddCourse(string9 CourseName);void ListCourses(void) const;void ListInfo(void) const;void SetGradDate(int year);Student(); // Constructor Function

private : // 4 private data memberschar studentName[30];string9 courses[6];int numCourses;int gradDate;

} ;

CS 210

Implementation file for Student

// IMPLEMENTATION FILE ( student.cpp ) // Implements the Student member functions.

#include “ student.h” // also must appear in client code

#include <iostream.h> . . .

void Student :: SetGradDate (int year ) { gradDate = year; }

. . .

CS 210

Class Constructors initialize Data Members

// In the file student.cppStudent :: Student () { //Default Constructor

numCourses = 0;gradDate = 0;strcpy(studentName, “John Doe”);

}

// This is invoked in client code at time of object declaration:// Student newStudent(“Mary Contrary”, 2010);Student :: Student(char name[ ], int year) { //Constructor with

parameters//We will fill this out in class!

}

CS 210

Use of C++ data type class

Facilitates re-use of C++ code for an ADT.

Software that uses the class is called a client.

Variables of the class type are called objects or instances of the class.

Client code uses public member functions to handle its class objects.

Private members cannot be directly accessed by client code. It can only be accessed by member functions.

CS 210

#include “student.h” // includes specification of the class#include <iostream.h>int main ( void ){

int newYear;string9 newCourse;Student newStudent; // create new Student object

cout << “Enter graduation year: “;cin >> newYear;newStudent.SetGradDate(newYear); // set Graduation datecout << “Enter course to be added: “;cin >> newCourse;newStudent.AddCourse(newCourse); // Add a course

newStudent.ListInfo(); // List Student informationnewStudent.ListCourses(); // List courses

} // end of main

Client Code Using Student