Yes, all the #include does is copy the text of the header file into the .cpp file before passing it to the compilerkrishna mohan said:Or does it get compiled with the main program?
A header file in C++ is a file that contains function declarations, global variables, and other definitions that can be used in multiple source files. It typically has a .h or .hpp extension and is included in source files using the #include directive.
A header file needs to be compiled in order for its declarations and definitions to be available for use in other source files. This allows for modularity and reusability of code, as different source files can use the same functions and variables defined in the header file.
A header file is not compiled on its own, but rather it is included in source files which are then compiled. To compile a source file that includes a header file, you can use a C++ compiler such as g++ or Visual Studio.
Yes, a header file can be included in multiple source files. This is one of the main purposes of a header file - to provide a centralized location for commonly used declarations and definitions that can be accessed by multiple source files.
Using header files in C++ allows for better organization and modularity of code, as well as easier sharing and reuse of code. It also helps to avoid errors and conflicts that can arise from declaring functions and variables multiple times in different source files.