#include <stdlib.h>
#include <stdio.h>

int intCmp( const void *lhs, const void *rhs )
{
  int lhint = *(const int *)lhs;
  int rhint = *(const int *)rhs;
  return lhint < rhint ? -1 : lhint > rhint;
}

int main( void )
{
  int i;
  int arr[] = { 3, 5, 1, 2, 6 };
  int SIZE = sizeof( arr ) / sizeof( int );

  qsort( arr, 5, sizeof( int ), intCmp );
  for( i = 0; i < SIZE; i++ )
    printf( "%d\n", arr[ i ] );
}