f78
gvcvt,
gcvtf
[format double or float as string]
SYNOPSIS #include <stdlib.h> char *gcvt(double val, int precision, char *buf); char *gcvtf(float val, int precision, char *buf);
DESCRIPTION
gcvt
writes a fully formatted number as
a null-terminated string in the buffer *buf.
gcvtf
produces corresponding character representations
of float
numbers.
gcvt uses the same rules as the printf format %.precisiong—only negative values are signed (with -), and either exponential or ordinary decimal-fraction format is chosen depending on the number of significant digits (specified by precision).
RETURNS
The result is a pointer to the formatted representation of val
(the same as the argument buf).
COMPLIANCE
Neither function is ANSI C.
Supporting OS subroutines
required: close,
fstat,
isatty,
lseek,