1GCVT(3)                    Linux Programmer's Manual                   GCVT(3)
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NAME

6       gcvt - convert a floating-point number to a string
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SYNOPSIS

9       #include <stdlib.h>
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11       char *gcvt(double number, size_t ndigit, char *buf);
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13   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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15       gcvt():
16           Since glibc 2.12:
17               _SVID_SOURCE ||
18                   (_XOPEN_SOURCE >= 500 ||
19                       _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) &&
20                   !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
21           Before glibc 2.12:
22               _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE &&
23               _XOPEN_SOURCE_EXTENDED
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DESCRIPTION

26       The gcvt() function converts number to a minimal length null-terminated
27       ASCII string and stores the result in buf.  It produces ndigit signifi‐
28       cant digits in either printf(3) F format or E format.
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RETURN VALUE

31       The gcvt() function returns the address of the  string  pointed  to  by
32       buf.
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CONFORMING TO

35       Marked  as LEGACY in POSIX.1-2001.  POSIX.1-2008 removes the specifica‐
36       tion of gcvt(), recommending the  use  of  sprintf(3)  instead  (though
37       snprintf(3) may be preferable).
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SEE ALSO

40       ecvt(3), fcvt(3), sprintf(3)
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COLOPHON

43       This  page  is  part of release 3.53 of the Linux man-pages project.  A
44       description of the project, and information about reporting  bugs,  can
45       be found at http://www.kernel.org/doc/man-pages/.
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49                                  2010-09-20                           GCVT(3)