Declaration:
void qsort(void *base,
size_t nitems, size_t
size, int (*compar)(const
void *, const void*));
Sorts an array. The beginning of the array is pointed to by
base. The array is nitems long with each element in
the array size bytes long.
The elements are sorted in ascending order according to the
compar function. This function takes two arguments. These
arguments are two elements being compared. This function must
return less than zero if the first argument is less than the
second. It must return zero if the first argument is equal to
the second. It must return greater than zero if the first
argument is greater than the second.
If multiple elements are equal, the order they are sorted in
the array is unspecified.
No value is returned.
Example:
#include<stdlib.h>
#include<stdio.h>
#include<string.h>
int main(void)
{
char string_array[10][50]={"John",
"Jane",
"Mary",
"Rogery",
"Dave",
"Paul",
"Beavis",
"Astro",
"George",
"Elroy"};
/* Sort the list */
qsort(string_array,10,50,strcmp);
/* Search for the item "Elroy" and print it */
printf("%s",bsearch("Elroy",string_array,10,50,strcmp));
return 0;
}
|
