What is C language made of?

The composition of C language is as follows:

1. Keywords: There are some reserved words with special meanings in C language, which are called keywords. These keywords are used to define the basic structure and grammatical rules of the language, such as variable types and control flow statements.

2. Identifiers: Identifiers are user-defined names used to identify variables, functions and types. In C language, identifiers consist of letters, numbers and underscores, and must start with letters or underscores.

3. data types: c language provides different data types for storing different types of data, such as integers, floating-point numbers and characters.

4. Operators: C language provides various operators for performing mathematical operations, logical judgments and bit operations.

5. control flow statements: c language provides various control flow statements to control the execution flow of programs.

6. Functions: Functions are the basic organizational units in C language and are used to encapsulate reusable code blocks. C language programs usually contain a main function, and other functions can be called when needed.

7. standard library functions: c language provides a series of standard library functions, which are used to perform common tasks, such as input and output, string processing and mathematical calculation.

Characteristics of C language

1. Concise and efficient: C language is a relatively concise language with fewer keywords and grammatical rules. Its design goal is as close as possible to the underlying hardware operation, so that the program can run efficiently.

2. strong portability: programs written in c language have strong portability on different computer platforms. The standard library functions of C language provide consistent interfaces and functions, so that programs can be compiled and run on different operating systems and hardware.

3. Strong expressive ability: C language provides rich grammar and functions, which can perform complex arithmetic and logical operations and realize flexible control flow and data processing.

4. Wide application: C language is widely used in system-level programming, embedded system, operating system development, driver programming and other fields.

5. Support process-oriented and structured programming: C language supports process-oriented programming paradigm, and can write code according to the execution order of programs.