SECOND LARGEST NUMBER IN AN UNSORTED ARRAY c program

SECOND LARGEST NUMBER IN AN UNSORTED ARRAY

main()
{
  int un[10], i, big1, big2;
  printf("Enter array elements: ");
  for ( i = 0; i < 10; ++i )
            scanf("%d", &un[i]);
  big1 = un[0];
  for ( i = 1; i < 10; ++i )
  {
            if ( big1 < un[i] )
                        big1 = un[i];
            if ( big1 != un[0] )
                        big2 = un[0];
            else
                        big2 = un[1];
  }
  for ( i = 1; i < 10; ++i )
  {
            if ( big1 != un[i] && big2 < un[i] )
                        big2 = un[i];
  }
  printf("Second largest: %d\n", big2);
  return 0;
}