Sorting program

/* Using qsort() and bsearch() with values.*/

#include
#include

#define MAX 20

int intcmp(const void *v1, const void *v2);

main()
{
int arr[MAX], count, key, *ptr;

/* Enter some integers from the user. */

printf("Enter %d integer values; press Enter after each.\n", MAX);

for (count = 0; count < MAX; count++)
scanf("%d", &arr[count]);

puts("Press a key to sort the values.");
getch();

/* Sort the array into ascending order. */

qsort(arr, MAX, sizeof(arr[0]), intcmp);

/* Display the sorted array. */

for (count = 0; count < MAX; count++)
printf("\narr[%d] = %d.", count, arr[count]);

puts("\nPress a key to continue.");
getch();

/* Enter a search key. */

printf("Enter a value to search for: ");
scanf("%d", &key);

/* Perform the search. */

ptr = (int *)bsearch(&key, arr, MAX, sizeof(arr[0]),intcmp);

if ( ptr != NULL )
printf("%d found at arr[%d].", key, (ptr - arr));
else
printf("%d not found.", key);
}

int intcmp(const void *v1, const void *v2)
{
return (*(int *)v1 - *(int *)v2);
}