The difference between header files and source files

The difference between header files and source files: 1. Different functions and uses. Header files are mainly used to declare and define variables, functions, classes, structures, etc. for use in other source files. Source files contain the actual implementation code of the program. ; 2. The compilation process is different. During the compilation process, header files are usually included in the source file. When the source file is compiled, the compiler will find and include the required header files; 3. Readability and maintainability are different. , The main purpose of the header file is to provide interfaces and declarations so that other source files can use them. By placing declarations and interfaces in the header file, it is easier to read.