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intro - Introduction to library functions
This chapter describes all library functions excluding the library
functions described in chapter 2, which implement system calls. There
are various function groups which can be identified by a letter which
is appended to the chapter number:
(3C) These functions, the functions from chapter 2 and from chapter
3S are contained in the C standard library libc, which will be
used by cc(1) by default.
(3S) These functions are parts of the stdio(3S) library. They are
contained in the standard C library libc.
(3M) These functions are contained in the arithmetic library libm.
They are used by the f77(1) FORTRAN compiler by default, but not
by the cc(1) C compiler, which needs the option -lm.
(3F) These functions are part of the FORTRAN library libF77. There
are no special compiler flags needed to use these functions.
(3X) Various special libraries. The manual pages documenting their
functions specify the library names.
Look at the header of the manual page for the author(s) and copyright
conditions. Note that these can be different from page to page!