What is C++?

The predecessor of C++ is C, which was designed by Dennis Richie at Bell Labs and first released in 1973. C is a widely used language and was used to write the early versions of Unix and Windows. Indeed, the libraries and software-development libraries of many operating systems are still written to have C interfaces. C is powerful because it can be used to write code that is compiled to a compact form, it uses a static type system (so the compiler does the work of type checking), and the types and structures of the language allow for direct memory access to computer architecture.

C, however, is procedural and based on functions, and although it has record types (struct) to encapsulate data, it does not have object-like behaviors to act on that encapsulated state. Clearly there was a need for the power of C but the flexibility and extensibility of object-oriented classes: a language that was C, with classes. In 1983, Bjarne Stroustrup released C++. The ++ comes from the C increment operator ++.

Strictly, when postfixed to a variable, the ++ operator means increment the variable, but return the variable's value before it was incremented. So the C statements int c = 1; int d = c++; will result in variable d having a value of 1 and variable c having a value of 2. This does not quite express the idea that C++ is an increment on C.