| GCVT(3) | Linux Programmer's Manual | GCVT(3) |
gcvt - convert a floating-point number to a string
#include <stdlib.h>
char *gcvt(double number, int ndigit, char *buf);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
gcvt():
(_XOPEN_SOURCE >= 500) ! (_POSIX_C_SOURCE >= 200112L)
|| /* Glibc since 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _SVID_SOURCE
The gcvt() function converts number to a minimal length null-terminated ASCII string and stores the result in buf. It produces ndigit significant digits in either printf(3) F format or E format.
The gcvt() function returns the address of the string pointed to by buf.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| gcvt () | Thread safety | MT-Safe |
Marked as LEGACY in POSIX.1-2001. POSIX.1-2008 removes the specification of gcvt(), recommending the use of sprintf(3) instead (though snprintf(3) may be preferable).
This page is part of release 4.16 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
| 2017-09-15 |