Computer calculations, how computers use calculators

Right-click on your computer to create a new offes software.

Computers can't even figure it out.

1. The general calculator has a percent sign, for example, 100*25%, click 100*25% in the calculator (the percent sign is generally in the lower right of the calculator).

2. If there is no percent sign in the calculator, you can divide the required percentage by 100, for example, 25% = 25 100.

Classification according to the form of expression:

Physical calculator, this kind of calculator is generally a handheld calculator, easy to carry, easy to use, but in general, the function is simpler, and it is not very convenient to upgrade the function, there are also a few powerful graphic handheld calculators, but due to the most expensive, in the case of the popularity of tablets and smartphones, it is not recommended to buy the most expensive multi-functional handheld calculator.

Learning computers from a low level is a relatively long road. However, the acquired knowledge is systematic. And the higher you go, the more efficient you are at learning your understanding (self-deception for the time being, after all, you haven't reached that height).

The following is a review of recent research and learning. Start with the problem as the context.

1. How does a computer do calculations?

Keywords: binary, logic gates.

2. On the basis of question 1, I asked: Why binary?

3. How does the CPU work?

1. How does a computer do calculations?

To solve this problem, we must first understand the method of human beings when using the decimal system for calculations, and will not go into details.

The decimal method is migrated to binary. Basic addition, multiplication (which can be converted into carrying), subtraction into addition, division into multiplication (I haven't delved into this yet).

Smooth conversions between decimal systems are possible.

Abstraction of numbers and decimal systems.

This is what I came up with on my own terms, and I haven't seen anyone say it, or there is one that I don't understand).

Bit and base size, carry. are the three basic elements.

A bit is a bit in the carry and is the carrier unit of the base number. Bits can only carry numbers (0 to -1). For example, in the decimal system, a bit can be placed 0-9 digits, and when it reaches 10, it needs to be carried forward. Binary, the maximum is 1, and 2 must be carried up.

Base size: is the so-called.

Carrying: The high +1 behavior that occurs when the number carried in the bit is equal to the base size.

So, there can be a base of 5. There can even be a 100 base, of course, if you can find the symbol of so many numbers, I am afraid that the human brain will have a hard time processing it.

The question arises again, why human beings have such an abstraction, I think the main reason is that the scope of cognition is limited, and the object of cognition is infinite. The reason why it is said that the scope of cognition is limited is mainly determined by the human body's functions, and it is not possible to think and deal with multiple problems at the same time (in parallel). To understand the infinite with limited cognition, we can only divide and conquer the infinite.

Numbers are an abstraction of the real world and quantities. Bits are the basic units of digital abstraction. For human beings, the matter in the real world is infinite, from small molecules and atoms to everything in the universe.

So the concept of using a base number can represent a specific quantity.

If there is a subject (such as God), he uses the infinite base system, in which everything in the universe is encompassed, and it does not need to be carried around. Everything is unique, then the human base system has no meaning, the premise of being able to use the infinite base system is to grasp the information of infinite things, the existence of superhuman thinking. This is the abstract power of infinity.

What is Computing.

Portals. Why do humans do calculations? Because human cognition is limited, in order to obtain information that cannot be obtained for the time being, it is necessary to change and combine information based on existing information, and computing is generated.

So, if humans can directly obtain any information, such as seeing a flat object and knowing its area and volume, then geometry-based operations such as length, width, height, and integration will no longer have their value, but that's just for now.

Computer (computer), commonly known as computer, is a modern electronic computer used for high-speed calculation, which can perform numerical calculations, logical calculations, and also has the function of storage and memory. It is a modern intelligent electronic device that can operate according to the program and process massive amounts of data automatically and at high speed.

A computer that consists of a hardware system and a software system without any software installed is called bare metal. It can be divided into five categories: supercomputers, industrial control computers, network computers, personal computers, and embedded computers, and the more advanced computers include biological computers, photonic computers, quantum computers, etc.

Inventor of the computer John von Neumann. The computer is one of the most advanced scientific and technological inventions of the 20th century, which has had an extremely important impact on human production and social activities, and has developed rapidly with strong vitality. Its application field has expanded from the initial military scientific research application to all fields of society, and has formed a huge computer industry, which has led to technological progress on a global scale, which has triggered profound social changes, and computers have spread all over ordinary schools, enterprises, and institutions, and have entered the homes of ordinary people, becoming an indispensable tool in the information society.

The application of computers is becoming more and more common in China, after the reform and opening up, the number of computer users in China has been rising, and the level of application has been continuously improved, especially in the fields of the Internet, communications, and many other fields. 1996-2009

The number of computer users increased from 6.3 million to 67.1 million, and the number of networked computers increased from 10,000 to 59.4 million. Internet users have reached.

There are 100 million mobile Internet users on the wireless Internet, of which 100 million are mobile phone Internet users, ranking first in the world.

8 bytes, the first bit is a sign bit. Indicates positive or negative. The complement code seeks the source of the state to send the code, and it is assumed that the judgment law is Nian He. Assuming that the source code is a positive number, the digit of the source dock of the positive number must be 0, and all judgments are negative. The negative source code is equal to the positive and negative traces of the complement code-1.

That is, (11110110 - 1) is negated = 00001010, because it is a negative number, its true value is -10

This of yours is normal Generally playing large games at a temperature of more than 70 degrees It's okay If it's too hot, the computer will automatically shut down If you're too hot, buy a laptop radiator The effect is very good.

Don't play for too long

Forty or fifty degrees, not high, very low. Normal is this temperature, don't worry. Just pay more attention to the cleanliness of the book.