7.25 day1

operation

1. What is a programming language?

   It is a thing of communication with the media is another thing. Python belong programming language programming language is communication between programmers and computer media.

2. What is programming?

   Programmer based on the syntax of a programming language will want to let the computer do it, written document in his own mind. So the result is programming a bunch of files, this program is a bunch of files.

3. Why programming?

   Bring powerful computers to help humans work, replace manpower.

4. 5 are composed of large computer What is the role?

   1 Controller

   The controller is a control system of a computer. Command and control computer.

   Operator 2

   Arithmetic operation is a computer system. All the time in operation. It realized arithmetic and logic operations.

   3 Memory

   The memory system of the computer is stored. Into memory and external memory

   4 input devices

   Hardware input information, such as a keyboard / mouse / U disk

   5 the output device

   Hardware output information, such as a monitor / printer / U disk

5. It works mechanical hard drive?

   Robot: Find data

   Track: storing data

   Sector: dividing track

6. qq start the process?

   1. Double-click the Windows desktop QQ icon (shortcut qq.exe corresponding path)
   2. Double-click the icon that is sent to the operating system instructions that tell the hard disk address corresponding operating system software QQ, and let the operating system starts this path
   3. Operating system receives an instruction to send instructions to the memory control CPU
   4. After accepting an instruction memory to send instructions to the hard disk, the hard disk memory to the software code read QQ, QQ start