this book starts with a chapter on data structure for two reasons. First, one has an intuitive feeling

that data precede algorithms: you must have some objects before you can perform operations on them.

Second, and this is the more immediate reason, this book assumes that the reader is familiar with the

basic notions of computer programming. Traditionally and sensibly, however, introductory programming

courses concentrate on algorithms operating on relatively simple structures of data. Hence, an

introductory chapter on data structures seems appro priate-this book starts with a chapter on data structure for two reasons. First, one has an intuitive feeling

that data precede algorithms:　you must have some objects before you can perform operations on them.

Second, and this is the more　immediate　reason, this book assumes that the reader is　familiar with　the

basic notions of computer programming. Traditionally and sensibly, however, introductory programming

courses　concentrate　on　algorithms　operating　on　relatively　simple　structures　of　data.　Hence,　an

introductory chapter on data structures seems appro priate