bubble sorting and searching

/* Bubble sort code */

#include <stdio.h>

void main()
{
  int arr[20], n, c, d, swap;

  printf("Enter 20 integers\n");

  for (c = 0; c < 20; c++)
    scanf("%d", &arr[c]);

  for (c = 0 ; c < ( 20 - 1 ); c++)
  {
    for (d = 0 ; d < 20 - c - 1; d++)
    {
      if (arr[d] > arr[d+1]) /* For decreasing order use < */
      {
        swap       = arr[d];
        arr[d]   = arr[d+1];
        arr[d+1] = swap;
      }
    }
  }

  printf("Sorted list in ascending order:\n");

  for ( c = 0 ; c < 20 ; c++ )
     printf("%d\n", arr[c]);

getch();
}