qsort(3) Library Functions Manual qsort(3)
NAME
qsort - Sorts a table in place
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <stdlib.h>
void qsort(
void *base,
size_t nmemb,
size_t size,
int (*compar) (const void *, const void *));
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
Points to the first entry in the table. Specifies the number of entries in the table. Specifies the size in bytes of each table entry.
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.
RELATED INFORMATION
Functions: bsearch(3), lsearch(3)
Standards: standards(5) delim off
qsort(3)
