head File.
The header file may be generated at the early stage of the compilation technology and is strictly publicized. After that, the project file or configuration file appeared. Since then, things in this area have been developed along the earliest statutes. Compared with the rapid upgrade and change of computing technology, they have changed little and are extremely stable.
Among C language programmers, there may be many who have not written header files. I have seen some units self-developed software, but there are dozens or hundreds of C program files without header files. At that time, I learned that *.c files can also be included.
The header file is a key technology for code reuse; it is also a very labor-saving and efficient design for the compiler. Therefore, after the initial design specification was announced, the differences between the header files of various languages are similar.
The header file is to declare some important structures, classes, formats, functions, and data through macro definitions.
Information about the organization of header files, compilation parameters, and process control of compilation operations is stored in the project file or configuration file.
If you have the opportunity to participate in a relatively large project, you will find that the early design is usually simple, effective, reliable, and convenient. However, it is difficult for most programmers to have intuitive experience with this.