What is a program? What is programming? What is an operating system? I'm a rookie, please advise me. I can't understand the definition by analogy.

I seriously doubt that you did it on purpose, but I'd better make it up to you.

First of all, what is an operating system?

The operating system is the Windows system of the computer you are using now, or the Android system or iOS system of the mobile phone.

You can imagine a computer as a car, and the operating system is the steering wheel, brake, throttle, clutch and gear lever. With these things, a car can "operate (drive)"

Of course, in general, you can only touch the parts, but in fact, there are many things that you can't see, such as the engine and brake system. You can't see them, but they must work before you can drive.

However, it is not enough for a car to have these. Soon you will find out how troublesome it is for you to drive standing up and how boring it is to have no entertainment on a long-distance bus.

If you want to drive, you need to turn the key to ignite first. When igniting, the battery will discharge, and then the spark plug will start to light. At this time, as soon as you step on the accelerator, gasoline will be pumped into the engine from the oil tank by the oil pump. The gasoline touches the open flame of the spark plug and starts to burn, pushing the piston in the engine cylinder, and the piston drives the transmission shaft through lever movement. At this time, you release the clutch, the transmission shaft is connected with the transmission system, and your car starts.

It seems difficult, but in fact you only did four things: press the clutch-turn the key-press the accelerator-release the clutch.

Similarly, in the computer, I want to use QQ, just double-click the QQ icon with the mouse. But in this process, the computer actually does more than automatically start, all you have to do is double-click the QQ icon.

QQ is a program, and the computer does what it should do according to the instructions of this program.

Programming is better understood. Nothing is gained for nothing, everything needs to be built-just like building a car. Computers are man-made, and so are computer software. The process of making computer software is called "programming".

Just like in real life, programs are not a line.

Something too abstruse is too professional. In short, remember:

Operating system is the interface between human and computer. Android, Symbian, Windows and iOS are all operating systems.

A program is a function in an operating system.

Programming is a manufacturing process.

In addition, the landlord forgot a concept called hardware. Hardware is like the parts of a whole vehicle-engine, steering wheel, fuel tank, various pedals. These are the "hardware" of cars, and only when these parts exist can they be called cars.

The same is true for computers, which need "hardware" such as CPU, fast memory device (memory), hard disk and motherboard to run.

But if you can't drive, can't you drive?

So software and hardware must work at the same time.