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A header file is a file with extension .h which contains C function declarations and macro definitions to be shared between several source files. There are two types of header files: the files that the programmer writes and the files that comes with your compiler.

The Steps involved are- Step ? 1. Write your own code in C++ and save the file with a . ... Step ? 2. Open a fresh window and include your header file. ... Step ? 3. ... #include<stdio. ... #include<string. ... #include<conio. ... #include<stdlib. ... #include<math.

What Are C++ Header Files? These are those files that store predefined functions. It contains definitions of functions that you can include or import using a preprocessor directive #include. This preprocessor directive tells the compiler that the header file needs to be processed prior to the compilation.

The .h is the extension of the header files in C and we request to use a header file in our program by including it with the C preprocessing directive ?#include?. C language has numerous libraries that include predefined functions to make programming easier.

To minimize the potential for errors, C++ has adopted the convention of using header files to contain declarations. You make the declarations in a header file, then use the #include directive in every . cpp file or other header file that requires that declaration.

A header file is a file with extension .h which contains C function declarations and macro definitions to be shared between several source files. There are two types of header files: the files that the programmer writes and the files that comes with your compiler.

Your header files should include all the definitions that they need to be fully compilable. Make your header file self-contained by including within it all header files that contain needed definitions. #include "another.h" /* definitions that depend on another.h */

The header files declare "what" a class (or whatever is being implemented) will do, ie the API of the class, kind of like an interface in Java. The cpp file on the other hand defines "how" it will perform those features, ie, the implementation of these declared functionality.