What does class mean in c++

In C, the class keyword is used to encapsulate data and behavior and define custom types. Its structure includes data members and member functions, and its functions include data abstraction, data hiding, object creation, polymorphism and code reuse. Developers can define classes, create objects, and access their members through the . operator.

Class in C

In C, class is a key used to encapsulate data and behavior Character. It allows developers to define custom types that group related data members and functions together.

The structure of class

The general structure of a class is as follows:

<code class="cpp">class ClassName {
  <data members>;
  <member functions>;
};</code>

Function

class The main functions include:

• Data abstraction:By encapsulating data members and methods in a single entity, the internal implementation details of the class can be hidden, exposing only the necessary information and operate.
• Data hiding: class can control access to data members, preventing external code from accidentally changing or viewing sensitive data.
• Object creation: Instances of class are called objects, and objects can be created by using the new operator.
• Polymorphism: Different classes can share the same basic behavior by inheriting from a common base class, while maintaining their own unique characteristics.
• Code reuse: By organizing shared behaviors and data into classes, code can be reused and development efficiency improved.

Usage

To use class, you need to first define a class and then create an object of that class. For example:

<code class="cpp">class Person {
  string name;
  int age;
};

int main() {
  Person John;
  John.name = "John Doe";
  John.age = 30;
  return 0;
}</code>

In the above code, we define a Person class, and then create a Person object named John . We can access the data members and methods of the John object through the . operator.

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