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C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as an intermediate-level language, as it comprises a combination of both high-level and low-level language features. Developed by Bjarne Stroustrup starting in 1979 at Bell Labs.
Commercial software, or less commonly, payware, is computer software that is produced for sale or that serves commercial purposes, a customer of the proprietary software pays a fee for a license to use the software.