Sort an array.

This function is compatible with the following targets:

ANSI

BeOS

EMB/RTOS

Mac OS

Palm OS

Win32

#include <stdlib.h>

void qsort(void *base,size_t nmemb,

Parameters for this facility are:

base	void *	A pointer to the array to be sorted
nmemb	size_t	The number of elements
size	size_t	The size of the elements
compare	void *	A pointer to a comparison function

The qsort() function sorts an array using the quicksort algorithm. It sorts the array without displacing it; the array occupies the same memory it had before the call to qsort().

The base argument is a pointer to the base of the array to be sorted.

The nmemb argument specifies the number of array elements to sort.

The size argument specifies the size of an array element.

The compare argument is a pointer to a programmer-supplied compare function. The function takes two pointers to different array elements and compares them based on the key. If the two elements are equal, compare must return a zero. The compare function must return a negative number if the first element is less than the second. Likewise, the function must return a positive number if the first argument is greater than the second.

"bsearch"

Refer to "Example of bsearch usage." .