#include <stdio.h>

#define MAXARRAY 10

void quicksort(int arr[], int low, int high);

int main(void)

{

int array[MAXARRAY] = {0};

int i = 0;

/* load some random values into the array */

for(i = 0; i < MAXARRAY; i++)

array[i] = rand() % 100;

/* print the original array */

printf("Before quicksort: ");

for(i = 0; i < MAXARRAY; i++)

{

printf(" %d ", array[i]);

}

printf("\n");

quicksort(array, 0, (MAXARRAY - 1));

/* print the `quicksorted' array */

printf("After quicksort: ");

for(i = 0; i < MAXARRAY; i++) {

printf(" %d ", array[i]);

}

printf("\n");

return 0;

}

/* sort everything inbetween `low' <-> `high' */

void quicksort(int arr[], int low, int high)

{

int i = low;

int j = high;

int y = 0;

/* compare value */

int z = arr[(low + high) / 2];

/* partition */

do {

/* find member above ... */

while(arr[i] < z) i++;

/* find element below ... */

while(arr[j] > z) j--;

if(i <= j)

{

/* swap two elements */

y = arr[i];

arr[i] = arr[j];

arr[j] = y;

i++;

j--;

}

} while(i <= j);

/* recurse */

if(low < j)

quicksort(arr, low, j);

if(i < high)

quicksort(arr, i, high);

}

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