OOP

Objects as Instances:

In our example, the class Distance acts like a blueprint. It defines the structure (data members and member functions) for creating objects. An object is an instance of a class, meaning it’s a specific realization of that class with its own set of data values.

Imagine Distance as a template for creating different user profiles. The class definition specifies the kind of information a distance can hold (e.g. 5’-6”, Five feet six inches). When you create an object, you provide the specific values for those data members.

Creating Multiple Objects:

Distance object1;  // Create an object named object1
object1.setFeet(2);
object1.setInches(4.5);

Distance object2;  // Create another object named object2
object2.setFeet(7);
object2.setInches(6.3);

// Now object1 and object2 hold different data

In this code, we create two separate objects, object1 and object2, both instances of Distance. We can set different values for feet and inches using the member functions for each object independently. This allows you to manage distinct data for each instance of the class.

Key Points:

• Objects hold specific data based on the class definition.
• Multiple objects of the same class can exist, each with its own data.
• Objects provide a way to model real-world entities with their properties and behaviors.

By understanding objects, you can effectively utilize classes to create reusable and modular components in your C++ programs.

Practice

• Place the code of section Creating multiple Objects inside main()
• Now append the main() function to the end of the Distance class created in the previous section.
• Save, Compile, and Execute the code to see what it does