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For example, an OO program that deals with banking transactions should be recognizable on the basis of the objects that it uses, such as deposit objects,withdrawal objects, account objects, etc.

An anecdotal description

If you have ever assembled a playscape in your back yard, this should sound familiar to you.

When you opened the large boxes containing the playscape, hundreds of objects spilled onto the ground. Those objects may have consisted of braces, chains,swing seats, slides, screws, nuts, bolts, washers, climbing ropes, ladder rungs, and other assorted objects.

Atomic and non-atomic objects

I will refer to (most of) the kinds of object that I have described in the above list as atomic objects. What I mean by that is that they can't be easilysubdivided into smaller objects without destroying their functionality.

If you were lucky, some of the objects in the box may not have been atomic objects. Instead they may have been pre-assembled arrangements of atomic objectssuch as an assembly of seats and braces representing a object on which two children can swing together.

Your job - assemble the objects

Your job was to assemble those hundreds of atomic and non-atomic objects into a final object which you proudly referred to as "The Playscape."

Objects working together

It has been said that a successful object-oriented program consists of a bunch of cooperating software objects working together to achieve a specifiedbehavior.

The overall behavior of the program is the combination of behaviors of the individual objects. For example, some objects may acquire input data, otherobjects may compute and produce output data, while other objects may display the output data.

It could also be said that a playscape consists of a bunch of hardware objects working together to achieve a specified behavior. The overall behaviorof the playscape is the combination of behaviors of the individual objects. For example, the behavior of some of the braces is to stand strong and not bend,while the behavior of a swing chain is to be flexible and move in a prescribed way.

Creating a model

One of the tasks often faced by an object-oriented programmer is to assemble software objects into a model that represents something that exists in the real world. As a very visual example, you might be asked to create an advertising webpage showing an animated software model of the playscape that you assembled in your back yard. With the playscape, you were simply required to assemble theexisting objects. However, in the object-oriented programming world, you must do more than just assemble objects.

Objects must be designed and manufactured

Getting back to the playscape, each of the objects for the playscape was manufactured before being shipped to you. Even before that, each object wasdesigned by someone and a set of manufacturing drawings was probably created so that the object could be mass produced.

A class is analogous to manufacturing drawings

In OOP, there is a direct analogy to the manufacturing drawings of the hardware world. We call it a class . A class documents the specifications for the construction of a particular type of software object. Forexample, there is probably a set of classes that describe the specifications for each of the button objects and menu objects at the top of the browser in whichyou are currently viewing this module.

Questions & Answers

the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
12, 17, 22.... 25th term
Alexandra Reply
12, 17, 22.... 25th term
Akash
College algebra is really hard?
Shirleen Reply
Absolutely, for me. My problems with math started in First grade...involving a nun Sister Anastasia, bad vision, talking & getting expelled from Catholic school. When it comes to math I just can't focus and all I can hear is our family silverware banging and clanging on the pink Formica table.
Carole
I'm 13 and I understand it great
AJ
I am 1 year old but I can do it! 1+1=2 proof very hard for me though.
Atone
hi
Adu
Not really they are just easy concepts which can be understood if you have great basics. I am 14 I understood them easily.
Vedant
find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
salma
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
kinnecy Reply
make 5/4 into a mixed number, make that a decimal, and then multiply 32 by the decimal 5/4 turns out to be
AJ
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
I rally confuse this number And equations too I need exactly help
salma
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
salma
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
hi
salma
hi
Ayuba
Hello
opoku
hi
Ali
greetings from Iran
Ali
salut. from Algeria
Bach
hi
Nharnhar
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
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Source:  OpenStax, Xna game studio. OpenStax CNX. Feb 28, 2014 Download for free at https://legacy.cnx.org/content/col11634/1.6
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