Object-oriented Programming, abbreviation OOP）, It's a kind of programming idea .Process oriented programming takes function as the basic unit of program . When programming , Write groups of functions , Then execute the functions step by step , That is, the sequential execution of a set of functions . To simplify programming , Process oriented functions continue to be divided into subfunctions , That is to cut large function into small function to reduce the complexity of the system .
Process oriented programming , The core is " The process ", Focus on the steps to solve the problem , That is, what to do first and then what to do . Process oriented programming is like a pipeline , It's a kind of mechanical thinking . If program starts with the solving a big problem , Process oriented programming thinking will decompose a big problem into many small problems , These small problems can be further decomposed , Until the small problem is simple enough to be solved in one small step .
The object-oriented programming takes the object as the basic unit of the program , When programming , Design many objects （ Class ）, Each object has the ability to solve some corresponding problems . Our object-oriented programming is based on process oriented programming , Class is the function （ Small steps ） It was packaged , As long as you find the specific class , Create objects , You can call the specific functions .
Object oriented is a thinking mode used to solve problems , In later development , Look for someone first , Call specific functions in the object . If there is really no object that can complete the requirements , Then define your own class , And define the required functions into the object , Convenient for future use .
Object oriented is an abstract programming idea , There is an idea in many programming languages .
1） demand
for example ： Wash the clothes
reflection ： There are several ways to do laundry ？
answer ： Hand wash and Machine wash .
2） Process oriented laundry
Hand washing is equivalent to washing clothes facing the process ：
After so many steps , You finally finished your clothes , But I'm exhausted .
3） Object oriented laundry
Machine washing is equivalent to object-oriented washing clothes .
This washing machine is the object , Put the clothes in the washing machine ：
You sit by the window and watch the sunset , Sigh that life is so beautiful ！
4） summary ：
reflection ： Compare two ways of washing clothes , Which way is simpler ？
answer ： Machine washing is simpler .
Machine wash only needs to find a washing machine , Add simple operations to complete the laundry work , And don't care what's going on inside the washing machine .
Object oriented is to treat programming as a thing , For the outside world , Things are used directly , Don't worry about his internal situation . Programming is about setting what things can do .
Object oriented programming is the use of class and object To create various models , To realize the description of the real world .
The reason for using object-oriented programming ：
Class class ： A class refers to the same feature extraction of the same thing , Extract the same attribute method and define it in the class .Object object ： An object is an instance of a class , The object is concrete , Class is abstract .Catalog 1. What is computer language 2. Compiler language and interpretive language in high level language (1) Compiler language (2) Explanatory language (3) Compiled language and interpreted language execution process 3. Knowledge expansion : 4. About Python 1. What is computer language ...
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