ecvt,  fcvt - convert a floating-point number to a string.


       #include <stdlib.h>

       char *ecvt(double number, int  ndigits,  int  *decpt,  int

       char  *fcvt(double  number,  int  ndigits, int *decpt, int


       The ecvt() function converts number to  a  null-terminated
       string  of  ndigits digits (where ndigits is reduced to an
       system-specific limit determined by  the  precision  of  a
       double),  and  returns  a pointer to the string. The high-
       order digit is nonzero, unless number  is  zero.  The  low
       order  digit  is rounded.  The string itself does not con­
       tain a decimal point; however, the position of the decimal
       point  relative  to  the  start of the string is stored in
       *decpt. A negative value for *decpt means that the decimal
       point  is  to the left of the start of the string.  If the
       sign of number is negative, *sign is  set  to  a  non-zero
       value,  otherwise  it's set to 0. If number is zero, it is
       unspecified whether *decpt is 0 or 1.

       The fcvt() function is identical to  ecvt(),  except  that
       ndigits  specifies  the number of digits after the decimal


       Both the ecvt() and fcvt() functions return a pointer to a
       static  string containing the ASCII representation of num­
       ber.  The static string is overwritten  by  each  call  to
       ecvt() or fcvt().


       These functions are obsolete. Instead, sprintf() is recom­
       mended.  Linux libc4 and libc5 specified the type of ndig­
       its  as  size_t.  Not all locales use a point as the radix
       character (`decimal point').


       SysVR2, XPG2


       gcvt(3), setlocale(3), sprintf(3)