First, the primer
1. What is the programming language?
Programming language is the medium of communication between man and computer
2. What is programming?
Programming is the person they want to command the computer to do things translated and written in a programming language files go
Why programming?
The purpose is to allow computer programming in accordance with the logic of spontaneous human thinking to work to liberate human
Second, computer composition principle
2.1 What is a computer?
Modern intelligent electronic device is a computer program can run in automatic, high-speed processing of massive data (hardware and software system components)
2.2, the five components of the computer
1, the controller (command computer system, running the computer for controlling the other components, corresponding to human brain)
2, the operator (the computer's processing capability for doing arithmetic and logic operations)
Operator + = CPU controller
3, the memory (memory of the computer, for storing data)
The memory is divided into memory and external memory
Memory: Based on the electric work
Advantages: speed reading
Disadvantages: Power data loss
External memory:
Advantages: permanently store data
Disadvantages: slow reading
4, the input device
Keyboard, mouse, video cameras
5, the output device
Displays, printers, etc.
Three core components of the computer
1, CPU: equivalent to the brain
2, memory: short-term memory
3, the hard disk: permanent storage
Hard disk is divided into: mechanical hard drive, solid state drive
Mechanical hard drives: a hard disk rotating mechanical arm reading data on tracks
SSDs: based on capacitive storage, using mathematical algorithms
Computer three institutions
1, the application
2, the operating system
3, computer hardware