Basic knowledge of C language

C is a general-purpose programming language developed in 1972 and is known for its efficiency and ability to interact with hardware. It has basic syntax such as comments, data types, variables, constants, operators and control structures. The C language includes components such as functions, libraries, files and pointers, and is widely used in operating system kernels, embedded systems and graphics development.

Basics of C Language

1. What is C language?

C is a common, structured programming language developed by Dennis Rich in Bell Labs in 1972. It is known for its efficiency, flexibility, and low-level interaction capabilities with hardware.

2. Basic syntax of C language

1. Comments:

 <code class="c">// 单行注释/* 多行注释*/</code>

2. Data type:

Basic data types in C language include integers, floats, chars, and bools.

3. Variables:

Variables are used to store values ​​and their data type needs to be declared before use.

4. Constant:

Constants are values ​​that cannot be modified and are usually named in capital letters.

5. Operator:

Various operators are provided in C for arithmetic, logical, and bit operations.

6. Control structure:

The control structure is used to control the program flow, including if statements, for loops, and while loops.

III. Components of C language

1. Function:

Functions are reusable blocks of code that receive parameters and return results.

2. Library:

A library is a collection of predefined functions and variables that extend the functionality of the C language.

3. Document:

A C language program consists of one or more text files containing source code.

4. Pointer:

A pointer is a data type that stores variable addresses, allowing direct access to memory.

IV. Application of C language

The C language is widely used in the following fields:

• Operating system kernel development
• Embedded system
• Graphics and game development
• System programming
• Desktop and mobile apps

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