I am just learning how to program, and am using this book to learn some good practices for game programing. Loving this book by the way. However I have a question about the code examples in the book.

Are they complete?

I was reading in chapter 3 about the Random Number Generator, and It seems like the example is not complete. It is clearly stated that it is a implementation of the mersenne twister pseudo random number generator, however, here is what is found in the book:
class CRandom {
// DATA
unsigned int rseed;
unsigned long mt[CMATH_N]; /* the array for the state vector */
int mti; /* mti==N+1 means mt[N] is not initialized */


// FUNCTIONS
public:
CRandom(void);

unsigned int Random( unsigned int n );
void SetRandomSeed(unsigned int n);
unsigned int GetRandomSeed(void);
void Randomize(void);
};

This is all there is though... and it seems incomplete. I may be missing something... I did find the google code project with the full version, but is this how every example in the book is going to be? Are they all incomplete examples that I need to look up in the source code, or are they complete in most cases, and this is an exception, not a rule. Thanks for anyone who can clarify for me.

OK, thank you for the clarification! I was just a bit lost... probably cause I don't sleep enough. I have been using the google code project, and it is really useful to see the code all typed out, makes it way easier to go over. Thanks for the help again!