functions

[distanceisdeath]

I'm having trouble understanding the concept of functions. How exactly are they used, and where do they go? Things like that. Thanks for the help.

[MadCow257]

here's a usage example

#include <stdio.h>

int generic(); // The decleration

int main()
{
	generic();
}

int generic() //The implementation
{
	int example = 15234+21534;
	return example;
}

Making functions usually has two parts:
The decleration (these go in .h files or at the top of source files)
and the implementation (these go in .c files)

The basic two purposes of a function are
-Saving space when a single chunk of code is going to be used multiple times
-Helping readibility

[cwr]

here's a usage example

#include <stdio.h>

int generic(); // The decleration

int main()
{
	generic();
}

int generic() //The implementation
{
	int example = 15234+21534;
	return example;
}

Careful there. Your prototype of:

int generic();

Is saying "generic is a function that returns int and takes any number of arguments".

If you called that function as generic("potato", 3, 8.5); the compiler wouldn't complain. You should instead use:

int generic(void);

The compiler then knows generic() takes no arguments.

[distanceisdeath]

thanks for the help