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One, POP and OOP

What is object-oriented programming?

POP: Process Oriented Programming. The program is seen as the sequential execution of a series of commands. The basic encapsulation form is function. The basic point of designing a function is IPO: input Input-- > handle Process-- > output Output.

OOP: Object Oriented Programming. The program is seen as the interaction of a series of objects. The basic form of encapsulation is class. The basic points of designing a class are RPM: relational Relation, attribute Property, and method Method.

2. Basic object-oriented concepts?

Classes: class, abstract data structures, data and algorithm encapsulation. For example, define a class: dog.

Object: object, an instance of the class. For example: an instance of the dog class: dot dot.

Attribute: properties, the data part associated with the object. Such as: weight weight, breed variety.

Method: methods, the algorithm part associated with the object. Such as: run (), eat (), bark ().

3. what are the advantages of object-oriented programming?

Easy to use: encapsulation, wonderful period symbols.

Easy to extend: inheritance, polymorphism.

Second, create classes and objects

Third, obtain object information

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