ecvt \*- output conversion
char *ecvt(value, ndigit, decpt, sign)
int ndigit, *decpt, *sign;
char *fcvt(value, ndigit, decpt, sign)
is called with a floating point number in fr0.
On exit, the number has been converted into a
string of ascii digits in a buffer pointed to by r0.
The number of digits produced is controlled
by a global variable \fI\*_ndigits\fR.
Moreover, the position of the decimal point is
contained in r2: r2=0 means the d.p. is at the
left hand end of the string of digits;
r2>0 means the d.p. is within or to the right
The sign of the number is indicated by r1 (0 for +; 1 for \*-).
The low order digit has suffered decimal rounding
(i. e. may have been carried into).
is converted and a pointer to a null-terminated
string of \fIndigit\fR digits is returned.
The position of the decimal point is stored indirectly
through \fIdecpt\fR (negative means to the left of the
If the sign of the result is negative,
the word pointed to by \fIsign\fR is non-zero, otherwise
\fIFcvt\fR is identical to \fIecvt\fR, except that the correct digit
has had decimal rounding for F-style output of the number
of digits specified by \fI\(*_ndigits\fR.