C Programming on the Mac L30 - Creating header files

[chevon1920]

But where do you actually define the function. Is it in the header file that you put in what should be in the function or the main.

[AppleProgramming]

@chevon1920 You define the names and parameters of your function in the header file. Your actual implementation of how the method works would be in a .c file which includes this header file.

[chevon1920]

@AppleProgramming

Ohhh, so the header file just has the declaration of the function and the .c file has a declaration and the actual function. ok Thanks so much!

[RMH1565]

Why do we need function prototypes anyway?

[AppleProgramming]

@RMH1565 If you look in the comments of the functions tutorial this will probably answer your question.

[tuhinbhatt1]

@AppleProgramming Thanks Buddy... Your series are awesome!!!

[tuhinbhatt1]

@AppleProgramming

How to add functions in the main files from the header files. I mean you created the function definition but what about the body part of the function where do you define it......

[AppleProgramming]

@tuhinbhatt1 You can define it either in a new C file or the same file (main.c) that the main method is in.

[kevinlau51]

Love it!

[diegoramos27]

I am making a calculator by using a dinamick stack and RPN, the prototypes of my functions are:

void push(Nodo **ptrPila,int valor);

void pop(Nodo **ptrPila);

I have all of that in a main file, but I'd like to use my pop and push functions as if they were part of c, like printf, and also could re- use those functions in more programs, but I'm only able to write the prototypes in a header file how can I add them their functionality then? like the one I wrote. THANKS.

[AppleProgramming]

@diegoramos27 My reply to this is the same as the other. You could make a separate .c file and then put all of your functions in that. Just reuse the c file and the header file.

[diegoramos27]

Thank you a lot for this, I'm also a mac programmer and this has helped me a lot, it is really simple but couldn't find out how to do it, just a question, if I make a complex function in my header I need to include both the prototype and functionality in the same file right? Because I was told they would need to be separate, thanks in advance.

[AppleProgramming]

@diegoramos27 In general you would create the prototype in the header file and define it in your .c files. Usually the .h file only contains the prototype for the function.