6.2. Program Components in C++

C++ programs are typically written by combining new functions and classes you write with "prepackaged" functions and classes available in the C++ Standard Library. In this chapter, we concentrate on functions.

The C++ Standard Library provides a rich collection of functions for performing common mathematical calculations, string manipulations, character manipulations, input/output, error checking and many other useful operations. This makes your job easier, because these functions provide many of the capabilities programmers need. The C++ Standard Library functions are provided as part of the C++ programming environment.