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Length: 2101 (0x835)
Types: TextFile
Notes: UNIX file
Names: »intro.3«
└─⟦26887b7e0⟧ Bits:30009717 Comet 32 harddisk image
└─⟦28c352965⟧ »/a« UNIX Filesystem
└─⟦this⟧ »usr/man/man3/intro.3«
.ig @(#)intro.3 2.1 7/1/84 @(#)Copyright (C) 1983 by National Semiconductor Corp. .. .TH INTRO 3 .SH NAME intro \- introduction to library functions .SH SYNOPSIS .B #include <stdio.h> .PP .B #include <math.h> .SH DESCRIPTION This section describes functions that may be found in various libraries, other than those functions that directly invoke UNIX system primitives, which are described in section 2. Functions are divided into various libraries distinguished by the section number at the top of the page: .TP 6n (3) These functions, together with those of section 2 and those marked (3S), constitute library .I libc, which is automatically loaded by the C compiler .IR cc (1). The link editor .IR ld (1) searches this library under the `\-lc' option. Declarations for some of these functions may be obtained from include files indicated on the appropriate pages. .TP (3J) These functions are part of the job control facilities, contained in the library .RB \*(lq \-ljobs .\*(rq The job control facilities are outlined in .IR jobs (3). .TP (3M) These functions constitute the math library, .I libm. The link editor searches this library under the `\-lm' option. Declarations for these functions may be obtained from the include file <math.h>. .TP (3S) These functions constitute the `standard I/O package', see .IR stdio (3). These functions are in the library .I libc already mentioned. Declarations for these functions may be obtained from the include file <stdio.h>. .TP (3X) Various specialized libraries have not been given distinctive captions. Files in which such libraries are found are named on appropriate pages. .SH FILES .nf /lib/libc.a /usr/lib/libm.a /usr/lib/libjobs.a .fi .SH SEE ALSO stdio(3), nm(1), ld(1), cc(1), intro(2) .SH DIAGNOSTICS Functions in the math library (3M) may return conventional values when the function is undefined for the given arguments or when the value is not representable. In these cases the external variable .I errno (see .IR intro (2)) is set to the value EDOM or ERANGE. The values of EDOM and ERANGE are defined in the include file .I <math.h>.