#include <stdio.h>
#define SIZE 5

void show(int ar[], int size) {
  int i;
  for (i = 0; i < size; i++)
    printf("%7d %7d\n", i, ar[i]);
}

void swap(int ar[], int i, int j)
{ int tmp = ar[i]; ar[i] = ar[j]; ar[j] = tmp; }

int main(void) {
  int i, counts[SIZE];
  for (i = 0; i < SIZE; i++) counts[i] = 11 * i;
  swap (counts, 0, 3);
  show (counts, SIZE);
  return 0;
}