double
nan(const char *tagp)
float
nanf(const char *tagp)
long double
nanl(const char *tagp)
"n-char-sequence")
is equivalent to the call
strod("NAN(n-char-sequence)", NULL).
The call
nan("")
is equivalent to the call
strod("NAN()", NULL).
The
nanf()
and
nanl()
functions are equivalent to
nan()
but substituting
strtof()
and
strtod(),
respectively.
),
nanf(),
and
nanl()
functions return a quiet NaN as specified by
tagp.
),
nanf(),
and
nanl()
functions return zero.
),
nanf(),
and
nanl()
functions conform to
ISO/IEC 9899:1999 (``ISO C99'') .