int in[] = {10, 32, -1, 567, 3, 18, 1, -51, 789, 0};

#define CHAR_HEIGHT 15
#define CHAR_WIDTH  8

static int cursor_x = 0, cursor_y = CHAR_HEIGHT;

lputchar(char c)
{
    switch(c) {
      case '\n': {
	  cursor_x = 0;
	  cursor_y += CHAR_HEIGHT;
        }
        break;
      default: {
	  putchar(cursor_x,cursor_y,c);
	  cursor_x += CHAR_WIDTH;
        }
	break;
    }
}

lputs(char *s)
{
    while (*s) lputchar(*s++);
}

/* lputd - output decimal number */
lputd(n) {
        char res[12];  /* can hold decimal ascii for signed 32-bit int */
	int pos = 10;
	int neg = 0;

	res[11] = '\0';
	if (n < 0) {
	        neg = 1;
		n = -n;
	}
	do {
	    res[pos--] = n%10 + '0';
	    n = n/10;
        } while (n);
	pos++;
	if (neg) res[--pos] = '-';
	lputs(res + pos);
}

main() {
	int i;

	sort(in, (sizeof in)/(sizeof in[0]));
	for (i = 0; i < (sizeof in)/(sizeof in[0]); i++) {
		lputd(in[i]);
		lputchar('\n');
	}
	return 0;
}


int *xx;

/* sort - sort a[0..n-1] into increasing order */
sort(a, n) int a[]; {
	quick(xx = a, 0, --n);
}

/* quick - quicksort a[lb..ub] */
quick(a, lb, ub) int a[]; {
	int k, partition();

	if (lb >= ub)
		return;
	k = partition(a, lb, ub);
	quick(a, lb, k - 1);
	quick(a, k + 1, ub);
}

/* partition - partition a[i..j] */
int partition(a, i, j) int a[]; {
	int v, k;

	j++;
	k = i;
	v = a[k];
	while (i < j) {
		i++; while (a[i] < v) i++;
		j--; while (a[j] > v) j--;
		if (i < j) exchange(&a[i], &a[j]);
	}
	exchange(&a[k], &a[j]);
	return j;
}

/* exchange - exchange *x and *y */
exchange(x, y) int *x, *y; {
	int t;


/**	printf("exchange(%d,%d)\n", x - xx, y - xx);  **/
	lputs("exchange(");
	lputd(x - xx);
	lputchar(',');
	lputd(y - xx);
	lputs(")\n");
	t = *x; *x = *y; *y = t;
}