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qsort(3)
NAME
  qsort - Sort a table in place

SYNOPSIS
  #include <stdlib.h>

  void qsort(
	  void *base,
	  size_t nmemb,
	  size_t size,
	  int (*compar)(const void *, const void *) );

LIBRARY
  Standard C Library (libc)

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  qsort():  XPG4, XPG4-UNIX

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  base
      Points to the first entry in the table.

  nmemb
      Specifies the number of entries in the table.

  size
      Specifies the size in bytes of each table entry.

  compar
      Points to the user-specified function to be used to compare pairs of
      table elements. The comparison function will be called with two
      parameters that point to the two elements to be compared.	 The
      comparison function must return an integer less than, equal to, or
      greater than zero, depending on whether the first element in the
      comparison is considered less than, equal to, or greater than the
      second element.

DESCRIPTION
  The qsort() function sorts a table having a specified number of entries.
  The contents of the table are sorted in ascending order according to a
  user-specified comparison function (the strcmp() function, for example).

NOTES
  The comparison function need not compare every byte, so arbitrary data may
  be contained in the elements in addition to the values being compared.

  When two members compare equal, their order in the sorted array is
  indeterminate.

SEE ALSO
  Functions: bsearch(3) lsearch(3)

  Standards: standards(5)

Index for Section 3

Alphabetical listing for Q

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