LinuxGuruz
  • Last 5 Forum Topics
    Replies
    Views
    Last post


The Web Only This Site
  • BOOKMARK

  • ADD TO FAVORITES

  • REFERENCES


  • MARC

    Mailing list ARChives
    - Search by -
     Subjects
     Authors
     Bodies





    FOLDOC

    Computing Dictionary




  • Text Link Ads






  • LINUX man pages
  • Linux Man Page Viewer


    The following form allows you to view linux man pages.

    Command:

    qsort

    
    
    

    SYNOPSIS

           #include <stdlib.h>
    
           void qsort(void *base, size_t nmemb, size_t size,
                      int (*compar)(const void *, const void *));
    
           void qsort_r(void *base, size_t nmemb, size_t size,
                      int (*compar)(const void *, const void *, void *),
                      void *arg);
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           qsort_r(): _GNU_SOURCE
    
    
    

    DESCRIPTION

           The  qsort()  function sorts an array with nmemb elements of size size.
           The base argument points to the start of the array.
    
           The contents of the array are sorted in ascending order according to  a
           comparison  function  pointed  to  by  compar, which is called with two
           arguments that point to the objects being compared.
    
           The comparison function must return an integer less than, equal to,  or
           greater  than  zero  if  the first argument is considered to be respec-
           tively less than, equal to, or greater than the second.  If two members
           compare as equal, their order in the sorted array is undefined.
    
           The qsort_r() function is identical to qsort() except that the compari-
           son function compar takes a third argument.  A pointer is passed to the
           comparison function via arg.  In this way, the comparison function does
           not need to use global variables to pass through  arbitrary  arguments,
           and is therefore reentrant and safe to use in threads.
    
    
    

    RETURN VALUE

           The qsort() and qsort_r() functions return no value.
    
    
    

    VERSIONS

           qsort_r() was added to glibc in version 2.8.
    
    
    

    CONFORMING TO

           The qsort() function conforms to SVr4, 4.3BSD, C89, C99.
    
    
    

    NOTES

           Library  routines  suitable  for  use as the compar argument to qsort()
           include alphasort(3) and versionsort(3).  To  compare  C  strings,  the
           comparison  function can call strcmp(3), as shown in the example below.
    
    
    

    EXAMPLE

           For one example of use, see the example under bsearch(3).
    
           Another example is the following program, which sorts the strings given
           in its command-line arguments:
    
           int
           main(int argc, char *argv[])
           {
               int j;
    
               if (argc < 2) {
                   fprintf(stderr, "Usage: %s <string>...\n", argv[0]);
                   exit(EXIT_FAILURE);
               }
    
               qsort(&argv[1], argc - 1, sizeof(char *), cmpstringp);
    
               for (j = 1; j < argc; j++)
                   puts(argv[j]);
               exit(EXIT_SUCCESS);
           }
    
    
    

    SEE ALSO

           sort(1), alphasort(3), strcmp(3), versionsort(3)
    
                                      2012-03-08                          QSORT(3)
    
  • MORE RESOURCE


  • Linux

    The Distributions





    Linux

    The Software





    Linux

    The News



  • MARKETING






  • Toll Free

webmaster@linuxguruz.com
Copyright © 1999 - 2016 by LinuxGuruz