This book is a companion for learning the C++ programming language. It presents some significant concepts, applied to an example, a multiple balls collision simulator, which will run in real-time in a multi-thread structure. The book explains the program. The goal is to make possible to the reader its improvement or even application to other fields. This book is neither a complete nor a simplified course. The objective is to be a complementary tool. Examples extending the program include the simplified simulations of a planet and its satellite and the creation of a fictional universe. The elementary simulation of a satellite launching is also possible and is a challenge to the reader, who needs to find the correct parameters. Therefore, this book is also helpful for teaching and studying physics (Newtonian mechanics). In this second edition, the program had minor changes to include a simplified simulation of computer virus propagation.