Advanced software engineering lab 2
Upcoming SlideShare
Loading in...5
×
 

Advanced software engineering lab 2

on

  • 399 views

Object-Oriented Concepts ...

Object-Oriented Concepts

Attribute: the basic data of the class.

Method (operation): an executable procedure that is encapsulated in a class and is designed to
operate on one or more data attributes that are defined as part of the class.

Object: when specific values are assigned to all the resources defined in a class, the result is an
instance of that class. Any instance of any class is called an object.

Statistics

Views

Total Views
399
Views on SlideShare
399
Embed Views
0

Actions

Likes
0
Downloads
2
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Adobe PDF

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Advanced software engineering lab 2 Advanced software engineering lab 2 Document Transcript

  • LAB 2-INTRODUCTION BS-III (ADVANCED S/W ENG.)Object-Oriented ConceptsAttribute: the basic data of the class.Method (operation): an executable procedure that is encapsulated in a class and is designed to operate on one or more data attributes that are defined as part of the class.Object: when specific values are assigned to all the resources defined in a class, the result is an instance of that class. Any instance of any class is called an object.Discovering ClassesDiscovering and defining classes to describe the structure of a computerized system is not an easy task. When the problem domain is new or unfamiliar to the software developers it can be difficult to discover classes; a cookbook for finding classes does not exist.Classes CategoriesClasses are divided into three categories:Entity: models information and associated behavior that is long-lived, independent of the surrounding, application independent, and accomplishes some responsibilityBoundary: handles the communication between the system surroundings and the inside of the system, provides interface, and facilitates communication with other systemsControl: model sequencing behavior specific to one or more use cases. Control classes coordinate the events needed to realize the behavior specified in the usecase, and they are responsible for the flow of events in the use caseExercise 1(identification of classes) Consider the following requirements for the Video Store system. Identify the candidate classes: The video store keeps in stock an extensive library of current and popular movie titles. A particular movie may be held on video tape or disk. Video tapes are in either "Beta" or "VHS" format. Video disks are in DVD format. Each movie has a particular rental period (expressed in days), with a rental charge to that period. The video store must be able to immediately answer any inquiries about a movies stock availability and how many tapes and/or disks are available for rental. The current condition of each tape and disk must be known and recorded. The rental charge differs depending on video medium: tape or disk (but it is the same for the two categories of tapes: Beta and VHS).The system should accommodate future video storage formats in addition to VHStapes, Beta tapes and DVD disks. The employees frequently use a movie code, instead of movie title, to identify the movie. The same movie title may have more than one release by different directors. You may use any (or mix) of the class elicitation methods to find the candidate classes.
  • Following two exercises are the programming assignments to assess the student’s ability:Programming assignment 1 Create an inheritance hierarchy of Vehicle: Car, Bus and Truck, with the School Bus further extending the hierarchy through the Bus. Each of the derived class objects should be packaging information about category and passenger carrying capacity of that vehicle. Provide a method that is common to all derived classes, such as getPassengerCapacity (), with class Truck having an additional method called getLoadingCapacity () that should be returning that trucks loading capacity in tons. Create objects of all the derived classes in a test class and store the references in an array (4 Elements) of type Vehicle, the top-level class of this hierarchy. Provide logic so that at every run of the program any one of the four references stored in the array is randomly selected and the methods of that object are called polymorphically. Every random access must result in display of category and passenger carrying capacity of that particular vehicle, except in the case of a Truck object, where the call must result in the display of category, passenger carrying capacity and the cargo loading capacity.Programming assignment 2 In this assignment you are required to do some string processing. Consider the English word "CONTAMINATION". This word consists of 13 letters. However, some of the letters occur more than once. There are ONLY 7 DISTINCT letters occurring in the string which are {A, C, I, M, N, O, T}. So, although, the total number of letters in the word is 13, there are ONLY 7 DISTINCT letters of the English alphabet in the string. Similarly, consider the word "RETREAT". It consists of 7 letters. However, there are only 4 DISTINCT letters in it which are {A, E, R, T}. Similarly the word "NEEDLE" consists of 6 letters but it contains ONLY 4 DISTINCT letters which are {D, E, L, E}. Now consider the word "FLASHING". It consists of 8 letters. But since no letter is repeated, the number of DISTINCT letters occurring in it is ALSO 8. Similarly the number of DISTINCT letters occurring in the word "PROMISE" is the SAME (7) as the TOTAL number of letters occurring in it. Write program which inputs a word (having not more than 15 letters) from the keyboard and displays the number of DISTINCT letters occurring in it.