Get Programming

Lesson 30. Making your own object types

After reading lesson 30, you’ll be able to

• Understand that an object has properties
• Understand that an object has operations associated with it
• Understand what dot notation means when working with objects

You use objects all the time in your daily life. You use computers and phones, handle boxes and envelopes, and interact with people and animals. Even numbers and words are basic objects.

Every object you use is made up of other objects. Except for the basic building blocks of matter, every object you interact with can be decomposed into smaller objects. For example, your calculator can be decomposed into a few basic components: the logic chip, screen, and buttons (and each of these into smaller components). ...