Ezust Alan, Ezust Paul. An Introduction to Design Patterns in C++ with Qt 4

Prentice Hall, 2006. — 656 p.C++ had been in use for many years before it was standardized in 1989, which makes it a relatively mature language compared to others that are in popular use today. It is a very important language for building fast, efficient, mission-critical systems. C++ is also one of the most flexible languages around, giving developers many choices of programming styles for use in high-level GUI code as well as low-level device drivers.