explain_strtold_or_die - convert string to number and report errors

       libexplain version 1.4
       Copyright (C) 2009 Peter Miller

                                                                                       explain_strtold_or_die(3)

       The explain_strtold_or_die function is used to call the strtold(3) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_strtold(3) function, and then the process terminates
       by calling exit(EXIT_FAILURE).

       The  explain_strtold_on_error  function  is  used  to  call  the  strtold(3)  system  call. On failure an
       explanation will be printed to stderr, obtained from the explain_strtold(3) function, but  still  returns
       to the caller.

       nptr    The nptr, exactly as to be passed to the strtold(3) system call.

       endptr  The endptr, exactly as to be passed to the strtold(3) system call.

       The explain_strtold_or_die function is intended to be used in a fashion similar to the following example:
              long double result = explain_strtold_or_die(nptr, endptr);

       explain_strtold_or_die - convert string to number and report errors

       The  explain_strtold_or_die  function  only  returns  on success, see strtold(3) for more information. On
       failure, prints an explanation and exits, it does not return.

       The explain_strtold_on_error function always returns the value return by the  wrapped  strtold(3)  system
       call.

strtold(3)
               convert ASCII string to floating‐point number

       explain_strtold(3)
               explain strtold(3) errors

       exit(2) terminate the calling process

       #include <libexplain/strtold.h>
       long double explain_strtold_or_die(const char *nptr, char **endptr);
       long double explain_strtold_on_error(const char *nptr, char **endptr))