What are the naming rules for C++ language identifiers?

C The naming rules for language identifiers are: 1. The naming of identifiers should start with uppercase and lowercase letters or underscores [_]; 2. Try to name identifiers with meaningful words, etc., to increase the program’s Readability; 3. Try to capitalize the first letters of different words in the name of a variable.

The naming rules for C language identifiers are:

The identifier is a sequence of characters used to identify variables , functions, data types, etc. C language identifiers consist of numbers (0~9), uppercase letters (A~Z), lowercase letters (a~z) and underscores (_). The letters are case-sensitive. The following are things to note when naming:

1. The name of the identifier must start with a letter (uppercase or lowercase) or an underscore (_), and numbers cannot be used. It is not recommended to start names with an underscore, because many compilers define identifiers that start with an underscore.

2. C naming identifiers are case-sensitive. When using Hungarian nomenclature, try to capitalize the first letters of different words in the name of a variable.

3. Try to name identifiers with meaningful words to increase the readability of the program.

4. C identifiers are often used for:

1). To identify the name of an object or variable

2).Members of classes, structures and unions

3). Member function of a function or class

4) Custom type name

5). Name of the macro

6). Parameters of the macro

5. To understand Hungarian nomenclature

Recommended tutorial: "C Video Tutorial"

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