(
c-addr u --
n flag1 flag2 ) ( F:
r -- ) or
(
r c-addr u --
n flag1 flag2 )
At
c-addr, place the character-string external
representation of the significand of the floating-point number
r. Return the decimal-base exponent as
n, the sign as
flag1 and "valid result" as
flag2.
The character string shall consist of the
u most significant
digits of the significand represented as a decimal fraction with
the implied decimal point to the left of the first digit, and
the first digit zero only if all digits are zero. The significand
is rounded to
u digits following the "round to nearest" rule;
n is adjusted, if necessary, to correspond to the rounded
magnitude of the significand. If
flag2 is
true
then
r was in the implementation-defined range of floating-point
numbers. If
flag1 is
true then
r is negative.
An ambiguous condition exists if the value of
BASE
is not decimal ten.
When
flag2 is
false,
n and
flag1
are implementation defined, as are the contents of
c-addr.
Under these circumstances, the string at
c-addr shall
consist of graphic characters.