[Tang Laoshi] C -- encapsulation: member method

Last article review

Access modifier

Determine access to member variables

public—— public

private—— private

Member variables

Variables declared in class

Describe the characteristics

The assignment is arbitrary

Any type

Any number

Today we will study in the future

Behavior of objects

Member method

 

【 Member method 】

    ​    ​ Through the previous articles , We can already use member variables to describe the characteristics of objects in classes , But for objects , Characteristics alone are not enough . Such as human characteristics ： full name , Age , Gender , Nationality and so on can be expressed by member variables , But for human behavior ： Walk , having dinner , Sleep and so on , You can't use member variables . What we are going to learn today Member method , In the idea of object-oriented programming , Namely Used to express behavior Of ！ 

Member method （ function ）

↓↓↓↓

Declare methods in classes （ function ）

↓↓↓↓

Write in a class statement block

 

Member method （ function ） The basic rules of

1. Declared in a class statement block

2. The rules are basically the same as the function declaration rules

3. Affected by access modifier rules

4. Is used to describe the behavior of objects

5. The return value parameter is not restricted

6. There is no limit to the number of methods

    ​    ​ Member method （ function ）, It is used to represent the behavior of objects , We can command an object to do a certain behavior through member methods , Concrete behavior is implemented externally without concern . We just need to know that we can get a certain result by issuing an order .

    ​    ​ For example, when we play games , Player objects can move , Can release skills , These are the actions of the player object , We just need to call the corresponding behavior method （ function ）, It can act accordingly . We only need to implement the specific logic in the function .

How to use these member methods （ function ）？

↓↓↓↓

 

Be careful

The member method should not add static keyword

The member method must instantiate the object before using

Member methods are affected by access modifiers

public Decorated methods can be called externally

private Decorated methods can only be called internally

Don't write access modifiers to think private

 

【 summary 】

    ​    ​ The member method is simple to understand ： Write methods in classes （ function ）, These methods represent the behavior of the object , These behaviors are realized through the logic in the method .

Member method

Describe behavior

Class

Any number

Return values and parameters

According to the demand

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