C Programming Tutorial 43, Include and Define Preprocessor Directives

[sonickk]

It doesn't *complicate* it, it just adds more to the language!

[iTzAdamX]

All of the definitions of stuff should go inside of the header files. That would mean things like enums, typedefs, structs, and function prototypes should be in there. All of the code for the functions should go in the .c files.

[srhalnon]

@TangoBravo 99% of c syntax works in c++. In fact many of the early c++ compilers simply translated c++ into c and than compiled that. 

[MrCavitysChessCorner]

Hi Adam,

Your videos are awesome. Very clear, concise, and to the point. So thanks for making them. I have a question though: what are some advantages of using macros over functions? I suppose you could save some time by not having to create a function declaration and what not but it seems like they both serve roughly the same purpose. What do you think?

Thanks again for making these very helpful and professional videos.

[iTzAdamX]

@lovepuremetal5 Probably not. However, once you learn C, C++ is really is to learn since the syntax is almost identical.

[DarshanParajuli]

are u ever gonna do c++ tutorials?? ...cuz ur tutorials are really good

[tcbetka]

LOL... Not hardly. There's this little concept called "Object Oriented Design" that complicates learning C++ just a tad.

[FelixNielsen]

It would seem that "myFile.h" is in a different location than "main.c", so according to what I heard you say, it should in fact not work, as the locations of "myFile.h" and "main.c" are different. Can you please explain how that works?

[suplattice]

Hi Adam, I was having problems when I put all functions (including typedef struct and typedef enum) in myfile.c in an attempt to tidy up the main.c. I found that I still need to copy e.g. [typedef enum {} season; ] and [void printPhrase(season);] in both main.c and myfile.c in order for it to work. I workaround by putting all functions in the myfile.h and deleted myfile.c, and it works. I wonder if this will cause any problems later when the program gets larger.

[weezywayne]

Would you get an error if your x value was a character?

[friendman]

the tutorials are good and all.. but i still don't understand the application of what you just explained.  Why would I want to do that... type of thing. 

I'm looking for a reason of use for these lessons are teaching and can't seem to think of any for some of them.  

Love the tutorials btw.

[adelin]

i can't get the file.h to work. i keep getting "Undefined reference to"printint" ". It works if i put #include"file.c" though. How can i get the header to work?(i'm using gcc in a terminal in linux)

[swallowedinthesea]

05:40, why is it %i and not %d for integer? Can they be used interchangeably?