PBA INSTITUTE

Header file creation in c

Creating a header file in C is a common practice to declare function prototypes, constants, and macros that can be used across multiple source files in a C program.

Create a New File:

Open your preferred text editor or IDE and create a new file. By convention, header files usually have a '.h' extension, For example : pba.h.

Declare functions and Constants :

Inside the header file, declare your functions using function prototypes and define any constants or macros that you want to make available to other source files.

Save the header file :

Save the file with a '.h' extension, such as 'pba.h'.

Using the Header File

1. Include the Header File: In your C source files where you want to use the functions or constants, include the header file using #include directive :
#include "pba.h"
2. Use the Functions and Constants:Once included, you can use the functions and constants defined in 'pba.h' just like any other function or constant in your program.

Example :

C Code

													
#include<stdio.h>
#include"pba.h"
 
main() 
{
   int num1 = 10, num2 = 10, num3;
   num3 = add(num1, num2);
   printf("Addition of Two numbers : %d", num3);
}

Output :
Addition of Two numbers : 20

conclusion :

header files are essential in C programming for structuring code, managing dependencies, promoting reusability, and enhancing overall code organization and maintenance. They are a foundational tool for building modular and maintainable software systems in C.