gcvt3
Convert a floating-point number to a string
Usage
#include <stdlib.h>
char *gcvt(double number, int ndigit, char *buf);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
gcvt():
Since glibc 2.17
(_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200809L))
|| /* glibc >= 2.20 */ _DEFAULT_SOURCE
|| /* glibc <= 2.19 */ _SVID_SOURCE
glibc 2.12 to glibc 2.16:
(_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200112L))
|| _SVID_SOURCE
Before glibc 2.12:
_SVID_SOURCE || _XOPEN_SOURCE >= 500
Library
Standard C library (libc, -lc)
Overview
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.
Return value
The gcvt() function returns buf.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| gcvt() | Thread safety | MT-Safe |
Releases
19 releases since Debian 1.1 (Buzz); the text changed 15 times.