Thread: creating header files and libs

Can someone explain or point me to a tutorial on writing my own functions into a header file. tia

Okay lets say you want to make a header. Just make any file with the extension .h so it may look like this. Lets just say for simplicity you have some simple function declarations.

test.h

Code:

#ifndef TEST_H // so we don't include multiple times
#define TEST_H

// Function Prototypes

void PrintHello( void );
int Add2Num( int n1, int n2 );

#endif // we are done here..

Then we must include the definitions for the functions we declared in the header somewhere..

test.c

Code:

#include <stdio.h>
#include "test.h"

void PrintHello( void )
{
  printf( "Hello" );
}

int Add2Num( int n1, int n2 )
{
  int result = n1 + n2;
 
  return( result );
}

Thats pretty basic, if you want something more complicated let me know. So say you have a main.c all you have to do is #include "test.h" and start calling those functions. Also make sure test.c is part of your current project.