Description: A header file is a file that contains declarations of C or C++ functions and macro definitions that are shared among several source files. These files, which usually have the .h extension, are fundamental in C and C++ programming as they allow for modularity and code reuse. By including a header file in a source file, the programmer can access functions, classes, constants, and other elements defined in the header, facilitating code organization and collaboration on large projects. Header files can also contain preprocessor directives, which allow for conditional inclusion of code and macro definitions, contributing to the flexibility and efficiency of development. In the context of programming in general, header files are essential for defining interfaces and structures that will be used in software development, allowing developers to create and manage components effectively.
