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'') .