Class attributes are variables that store object state information and have different access rights, including public, protected and private. They can be of any data type and are declared in the class definition. Access permissions determine from where a property can be accessed, and methods can manipulate or retrieve property values. The use of attributes provides a way to encapsulate and organize class data, improving the readability, maintainability and scalability of the code.
Attributes of the class in C
Attributes are member variables of the class, used for Stores information about the state of an object. They determine the characteristics and behavior of objects.
Access permissions:
Attributes in a class can have different access permissions:
- public: Attributes can be in a class accessible from the outside in any way.
- protected: Properties can only be accessed within the class itself and its derived classes.
- private: Properties can only be accessed within the class itself.
Type:
Attributes can be any data type, including:
- Basic types (int, float, char, etc.)
- Own object type (custom class)
- Enumeration
- Pointer
Declaration and access:
Class properties are declared in the class definition as follows:
class MyClass { public: int age; private: std::string name; };
To access properties, you can use the dot operator (.
) as follows:
MyClass person; person.age = 25;
Attributes and methods:
Attributes are usually used in conjunction with class methods, which are used to operate or retrieve attribute values. For example, the following method sets the name
attribute:
class MyClass { public: void setName(std::string newName) { name = newName; } private: std::string name; };
Using attributes:
Attributes provide a way to encapsulate and organize class data. They allow centralized control and access to object state, thereby improving code readability, maintainability, and scalability.
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