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學習C語言的必備基礎知識

'學習C語言的必備基礎知識'
?學習C語言的必備基礎知識Chapter 1 storage of computers and dataSection 1 Understanding ComputersOne thing is very strange, now C language teaching materials, it is a variable expression, do not mention the computer principle aspect, the C Ianguage as a language, mathematics to learn, but blunt lists some grammar rules, students are difficult to understand, but to rote learning, not to grasp the essence of things? Can not arbitrarily, in fact, the C language is a very good language, the core grammar rule is very small, and are closely related and computer, so we must learn some basic computer, master the computer basic knowledge of C language learning is crucial for the future of other programming Ianguages are extremely good C language has an advantage, is very simple, and c++, Java, C#, JavaScript and other languages have very similar way of writing, so Learning C language can easily transition to a large number of other programming Ianguages? After the C, will be launched Java, C#, C++, JavaScript, ruby, Python and so on, but is on the basis of this tutorial, so C language is a foundation, want to learn programming, strongly recommend starting from C language?Let's get down to computers?According to Von Neumann's theory, a computer consists of 5 parts, ALU, controller, memory, input and output device? Now we usually put the unit controller and together, called CPU (CPU), memory is what we say in memory and on disk? The input device is mouse, keyboard and other equipment, the-省略部分- the internationalization process, we must consider the good encoding?3. storage of picturesThe picture is composed of spots, a picture size is 200*300, there was a 60000 (200*300) points, each point has its own color, these colors are combination of pictures together, if every color we use one byte of memory, so there can be at most 256 colors, so the pictures stored in color will look a little distortion, if you use two bytes to represent color can express the color has 65536 kinds, basically more than the resolution of the human eye, looks no distortion, if we want to better color, will use 3 bytes of 24 bits, or 4 bytes of 32 bits to store color that picture is more realistic, need more space?* the video will be played continuously, it will give the effect of moving, if not compressed, the video will take up a lot of storage space, video is basically compressed storage?4. storage of soundSound is a wave, we put the waveform divided into small sections, each section of the average amplitude with a binary number representation, storage, which is called sampling, which is equivalent to the sound stored up, usually per second to 44. IK segments can achieve undistorted effects? If the sampling frequency is low, the sound quality will decrease?Sum up:1. the number of binary storage, sixteen hexadecimal conversion between the number of the system, the multi byte memory, with the number of symbols stored?The storage of 2. characters is encoded and stored digitally
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學習 c語言 必備 基礎 知識
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