The passage of time the hourglass is continuously, advancing the annual rings of time, and I also came to a new way of life, that is software technology, this is a new, no fancy stuff, I hope I can learn well,

Application: a series of instructions, and the man-machine communication
Programming language
The machine language of 0 1
Assembly language mnemonics AND
A high-level language compiler (interpreter) - machine language

C - process oriented language program=data structure + algorithm
Data structure, data type, the relationship between the data
Algorithm: the methods and steps to solve the problem, the same question of algorithm has a lot of, on the basis of understanding remember

embedded programming soft hard couple,
Internet of things all can be connected to the

The Internet computer networking

Java - object oriented language (closer to human habits)

Language: communication tool
Hardware: see, touch,
Software: system software, application software
Storage structure: memory (working memory, cannot persist data) CRT (hard drive, usb flash drive, cd-rom, persisted data)
Bytes (byte) : the smallest unit of information stored, 1 byte=8 bits
Bits (bite) : a binary, can only be stored 0 or 1
Word length (a CPU can process data length)

Data: information symbolization of 1 + 2 a

Data types -- -- -- -- -- - different data can participate in different operations, distribution of different types of different memory space

All the data are divided into constant (the program is running, the same amount) and variables (program is running, the amount of change) two
Type
Constant
The integer is an integer, 1, 2,
There must be a decimal floating point, namely, the decimal 1.2, 3.4
Said method has two kinds: common, index form e3 (e3) 3.4, 3.4 e before and after must be digital, and after the number must be an integer
Character: single quotation marks around a single character 'a'
In addition to the ordinary character constants, and escape character '\ n' representative enter

Identifier: name, with a letter, underscore, of Numbers, not begin with digital
Divided into keyword, user-defined identifier

Variable

Int integer (4 bytes) short long (said number is different, the range of bytes) of the
Floating-point
Character

2019.10.8

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