How to Create Your Own Header File in C Programming ?

January 10, 2025 1 Comment » Hits : 425



Make Your Own Header File ?

Step1 : Type this Code 

int add(int a,int b)
{
return(a+b);
}
  • In this Code write only function definition as you write in General C Program

Step 2 : Save Code

  • Save Above Code with [.h ] Extension .
  • Let name of our header file be myhead [ myhead.h ]
  • Compile Code if required.

Step 3 : Write Main Program

#include<stdio.h>
#include"myhead.h"
void main()
{
int number1=10,number2=10,number3;
number3 = add(number1,number2);
printf("Addition of Two numbers : %d",number3);
}
  1. Include Our New Header File .
  2. Instead of writing < myhead.h> use this terminology “myhead.h”
  3. All the Functions defined in the myhead.h header file are now ready for use .
  4. Directly call function add(); [ Provide proper parameter and take care of return type ]

Note

  1. While running your program precaution to be taken : Both files [ myhead.h and sample.c ] should be in same folder.

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My name is Pritesh Taral. I am working in well known MNC. as Java Developer. I am part time blogger loves writing articles on C/C++. I am active on facebook using community fan page .One can Visit me @ Facebook Facebook Fan Page
  • Bofh

    In order to prevent multiple definitions of functions when recursively including headers write something like this:
    int func( … )
    #ifndef func_included
    #define func_included
    { body; }
    #else
    ;
    #endif