According to the C++ Standard, [intro.scope], paragraph 2 [ISO/IEC 14882-2014] states the following:
C++ is a general purpose programming language based on the C programming language as described in ISO/IEC 9899:1999 Programming languages — C languages—C (hereinafter referred to as the C standard). In addition to the facilities provided by C, C++ provides additional data types, classes, templates, exceptions, namespaces, operator overloading, function name overloading, references, free store management operators, and additional library facilities.
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