gcvt - Online Linux Manual PageSection : 3
Updated : 2023-02-05
Source : Linux man-pages 6.03

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NAMEgcvt − convert a floating-point number to a string

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LIBRARYStandard C library (libc, −lc)

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SYNOPSIS#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

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DESCRIPTIONThe 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.

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RETURN VALUEThe gcvt() function returns buf.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue gcvt() Thread safetyMT-Safe

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STANDARDSMarked 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).

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SEE ALSOecvt(3), fcvt(3), sprintf(3) 0

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