1 / 16

Data Structures

Data Structures. Lecture 1: Introduction. Course Contents. Data Types Overview, Introductory concepts Data Types, meaning and implementation Abstract data types (ADT) Arrays (revisited) Structures Linked Lists Stacks (recursion) Queues Trees (traversals, implementation).

inara
Download Presentation

Data Structures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Data Structures Lecture 1: Introduction

  2. Course Contents • Data Types • Overview, Introductory concepts • Data Types, meaning and implementation • Abstract data types (ADT) • Arrays (revisited) • Structures • Linked Lists • Stacks (recursion) • Queues • Trees (traversals, implementation)

  3. Course Contents • Binary Trees • Indexing Methods • Hashing • Binary Search Trees • Balanced Search Trees • (AVL Tree) Adelson-Velskii-Landis • Heaps • Splay Trees • Graphs, adjacency matrices and lists

  4. Text book • “Data structures using C and C++”, YedidyahLangsam, Moshe J Augenstein and Aaron M. Tenenbaum, 2 ed, 2002 • Reference Books: • D. Wood: “Data structures, algorithms and performance”, Addison-Wesley, 1993 • C++ Data Structures by Nell Dale and David Teague • http://www.brpreiss.com/books/opus4/html/book.html • Any other book on Data Structures

  5. Lets start the course!

  6. Why Study? • Designed to develop students understanding the impact of structuring data to achieve efficiency of a solution to a problem • After completion you will be familiar with important and most often used data structuring techniques. • It will enable you to understand the manner in which data is organized and presented later.

  7. Objectives of the course • Present in a systematic fashion the most commonly used data structures, emphasizing their abstract properties. • Discuss typical algorithms that operate each kind of data structure, and analyze their performance. • Compare different Data Structures for solving the same problem, and choose the best

  8. Abstract Data Type ADT • A data type whose properties (domain and operations) are specified independently of any particular implementation • ADT is a mathematical model which gives the a set of utilities available to the user but never states the details of its implementation. • In OO-Programming a Class is an ADT

  9. Data Structures: Definition • A collection of data elements whose organization is characterized by accessing operations that are used to store and retrieve the individual data elements; • The logical arrangement of data as used by a system for data management; a representation of a data model in computer form

  10. Data Structures: More specifically • A data structure is a way of grouping fundamental types (like integers, floating point numbers, and arrays) into a bundle that represents some identifiable thing. • For example, a matrix may be thought of as the bundle of the number of rows and columns, and the array of values of the elements of the matrix. This information must be known in order to manipulate the matrix. • C introduced the struct for declaring and manipulating data structures. C++ extended the struct to a class

  11. Goals of Data structures • Identify and develop useful mathematical entities and operations and to determine what classes of problems can be solved by using these entities and operations. • Determine representation of those abstract entities and to implement the abstract operation on these concrete representations.

  12. A Real Life Example • Lisa • Michele • John • 110 • 622-9823 • 112-4433 • 75 • Bronson • Paola Electronic Phone Book Contains different DATA: - names - phone number - addresses Need to perform certain OPERATIONS: - add - delete - look for a phone number - look for an address How to organize the data so to optimize the efficiency of the operations

  13. The first Data Structure • An Array!

  14. Word about Arrays! • Lets Get Started: • Arrays are data structures • Finite • Contiguous • Fast • Direct Access • All elements of same data type • (Can be based upon primitive or ADT) • Insertion / Deletion ??? HOW?? 

  15. Arrays • How to Input arrays • How to process arrays • How to insert an item in an array • How to delete an item from an array • How to pass an array

  16. Array How to add 4 How to add 1 in the array? Not possible

More Related