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              header

              <cstddef> (stddef.h)

              C Standard definitions
              This header defines several types implicitly generated or used by certain language expressions.

              Types


              In C, this header also includes the declaration of the wchar_t type (wide character type), which in C++ is a language keyword that identifies a distinct fundamental type (no header inclusion required in C++).

              Macro functions


              Macro constants

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