C source Program structure characteristics (test center)

structure Characteristics of C source program

2. A C language source program can consist of one or more source files.  

4. Each source file can consist of one or more functions.  

6. A source program has one and only one main function, that is, the main function, regardless of how many files it consists of. If a program does not have a main function, the program does not have the ability to run

8. Functions are executed only when they are called, and the main function has a system call

10. There can be preprocessing commands in the source program ( the Include command is only one of them ), and the preprocessing commands should usually be placed at the front of the source file or source program.  

12. For each description, each statement must end with a semicolon. However,you cannot add semicolons after preprocessing commands, function headers, and braces "}".  

14. identifiers, you must add at least one space between the keywords to indicate the interval. If you already have a distinct spacer, you can no longer add spaces to the interval.  

C language Vocabulary

The words used in the C language are divided into six categories: identifiers, keywords, operators, separators, constants, annotation characters, and so on.  

C source Program structure characteristics (test center)