16 In C, what are the two types of files based on how the data is organized?

In the C language, files can be divided into ASCI files and binary files according to the way the data is organized. ASC code.

A file, also known as a text file, is a file that is composed of individual characters, and each byte holds an ASC code representing a character. Binary files are stored on disk in the form in which the data in memory is stored.

In C, files can be divided into text files and binary files depending on how the data is organized.

The correct answer is DConsists of a sequence of characters (bytes).

The answer is: d consists of a sequence of characters (bytes).

Strictly speaking, a file consists of a binary sequence of data.

Chinese in C language can be divided into text files and binary files according to the storage form, and text files are also called plain text files.

A text file is a computer file, which is a typical sequential file, and the logical structure of the file belongs to the streaming file. Text files refer to files stored in ASCII code (also known as text mode), more precisely, English, numeric and other characters are stored in ASCII code, while Chinese characters are stored in the machine code. Text files cannot store any information other than valid character information (including carriage returns, line breaks, etc., which can be represented by ASCII characters).

A binary file is a file that contains data or program instructions written in ASCII and extended ASCII characters, and a binary file in a broad sense refers to a file, named after the binary form in which the file is stored on an external device. Binaries in the narrow sense are files other than text files. A text file is a computer file that consists of many lines of closed lead characters.

Text files exist in computer systems, and the file end flag is usually placed on the last line of the text file. The encoding of text files is based on the fixed scramble length of characters, and it is relatively easy to decode. Binary file encoding is longer, the flexible utilization rate is higher, and the decoding is more difficult, and different binary file decoding methods are different.

Data can be organized in the following ways:

a.Text: Text is a basic form of data organization, which can be created, stored, and processed using tools such as texters, electronic software, and database management systems.

b.:* is a common form of data organization that can be created, stored, and processed using processing software.

c.Files: Files are a form of data organization that can be created, stored, and processed using an operating system or specific software, such as text files, image files, audio files, and files.

d.Database: A database is a software system designed to store, manage, and query structured data, and supports a variety of data organization forms, such as relational databases, NoSQL databases, distributed databases, etc. or belt type.

In addition to the above data organization forms, there are some other data organization forms, such as binary data, JSON, XML, etc. According to actual needs, developers can choose the most suitable form of data guessing organization for their application scenarios.

According to the different characteristics of the relationship between data elements, data structures are often divided into the following four basic structures:

Collection structure. The relationship between the data elements of the structure is "belonging to the same set".

Linear structure. There is a one-to-one relationship between the data elements of the structure.

Tree structure. There is a one-to-many relationship between the data elements of the structure.

Graphical structure. There is a many-to-many relationship between the data elements of this structure, also known as a mesh structure.

A data structure is the way a computer stores and organizes data. A data structure is a collection of data elements that have one or more specific relationships with each other. Often, a well-chosen data structure can lead to higher operational or storage efficiency.

1 Conversion Specifier.

a(%a) floating-point numbers, hexadecimal numbers, and p-(p-) notation (c99)%c characters.

d is a signed decimal integer.

f Floating-point numbers (including floats and doulbe)%e(%e) Floating-point exponential output [e-(e-) notation]%g(%g) floating-point numbers are not meaningless zeros"0"

i is a signed decimal integer (same as %d).

u is an unsigned decimal integer.

o Octadecimal integer 0123

x(%x) hexadecimal integer: 0f(0f) 0x1234%p pointer.

s string.

2 Signs. Left Alignment:"-" "%-20s"

Right-aligned:"+" "%+20s"

Space: If the symbol is positive, a space is displayed, and if it is negative, it is displayed"-" "% "

: No effect on classes C, S, D, U; For class O, prefix o at output; For class x, prefix 0x at output;

For classes e, g, f, the decimal point is given only when the result has a decimal place.

3 Format string (format).

Flags: Output Minimum Width, Accuracy, Length, Type"％-md": Left alignment, if m is less than the actual output, according to the actual output.

": Output m bit, take the string (from left) n bit, fill in the space left, when n>m or m omitted, m=n

"Enter China

Output" ch"

": Outputs floating-point numbers, m is the width, and n is the digit to the right of the decimal point"%"Input.

Output length: H is the short shaping amount, L is the long shaping amount.

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It is divided into ASCII code file and binary file.

Text files and binary files.