3.5. C Functions and Struct Pointers

Although your code will certainly call many Objective-C methods, it will also probably call quite a few C functions. For example, I mentioned in Chapter 1 that the usual way of initializing a CGPoint based on its x and y values is to call CGPointMake, which is declared like this:

CGPoint CGPointMake (
   CGFloat x,
   CGFloat y
);