1 Scope
This part of ISO/IEC TS 18661 extends programming language C, as specified in ISO/IEC 9899:2011 (C11) with changes specified in ISO/IEC TS 18661‑‐1, to support decimal floating-‐point arithmetic conforming to ISO/IEC/IEEE 60559:2011. It covers all requirements of IEC 60559 as they pertain to C decimal floating types.
This part of ISO/IEC TS 18661 supersedes ISO/IEC TR 24732:2009.
This part of ISO/IEC TS 18661 does not cover binary floating-‐point arithmetic (which is covered in ISO/IEC TS 18661‑‐1), nor does it cover most optional features of IEC 60559.