Today many complex communications and digital signal processing (DSP) systems are described using ANSI C or C++ with floating-point mathematics. ANSI C or C++ is the language most commonly used by system engineers since the language has been incorporated into university programming courses and a variety of environments are available for code development, compilation and debug. The system engineer defines global functionality using the built-in operators, data types and expressions in C and classes in C++. Often, the functions are algorithms that perform filtering, modulation, demodulation, compression, coding and other operations on digital signals. Initially, these algorithms are developed in a pure mathematical environment using idealized representations of the signals and operators. Floating-point mathematics is typically used in operations on signals with infinite precision, where no assumptions are made on the limitations of the signal dynamics or timing.

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