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

     (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

     (3X) Various special libraries.  The manual pages  document-
          ing 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!