<p>It's defined in <code>stddef.h</code>.</p> <hr> <p>That header defines the integral types <code>size_t</code>, <code>ptrdiff_t</code>, and <code>wchar_t</code>, the functional macro <code>offsetof</code>, and the constant macro <code>NULL</code>.</p>

Where is ptrdiff_t defined in C?

Tags:

c

types

stdint

libc

It's defined in stddef.h.

That header defines the integral types size_t, ptrdiff_t, and wchar_t, the functional macro offsetof, and the constant macro NULL.

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