C++ is an essential programming language for academicians and students around the globe. It is also widely used in industries. The book Object Oriented Approach using C++ is intended as a useful textbook. It explains the subject with examples and real life references with a view to bring home the subject within the comprehension of the readers. The concepts are covered in this book in detail with execution results and explanations. Also, C++ with Linux is given importance and has been covered in depth. Wherever possible, there has been a comparison with C programming for easy understanding. The exercises and questions are given at the end of each chapter and answers at the end of the book equip the readers in facing examinations/interviews effectively. Above all, the text is presented in such a way that the reader enjoys and learns the subject.