Hailstone sequence: Difference between revisions

=={{header|FutureBasic}}==

<lang futurebasic>

local fn Hailstone( n as NSInteger ) as NSInteger

'~'1

NSInteger count = 1

while ( n != 1 )

if ( n and 1 ) == 1

n = n * 3 + 1

count++

end if

n = n / 2

count++

wend

end fn = count

local fn PrintHailstone( n as NSInteger )

'~'1

NSInteger count = 1, col = 1

print "Sequence for number "; n; ":" : print

print using "########"; n;

col = 2

while ( n != 1 )

if ( n and 1 ) == 1

n = n * 3 + 1

count++

else

n = n / 2

count++

end if

print using "########"; n;

if col == 10 then print : col = 1 else col++

wend

print : print

print "Sequence length = "; count

end fn

window 1, @"Hailstone Sequence", ( 0, 0, 620, 400 )

NSInteger n, seq_num, x, max_x, max_seq

seq_num = 27

print

fn PrintHailstone( seq_num )

print

for x = 1 to 100000

n = fn Hailstone( x )

if n > max_seq

max_x = x

max_seq = n

end if

next

print "The longest sequence is for "; max_x; ", it has a sequence length of "; max_seq; "."

HandleEvents

</lang>

{{output}}

<pre>

Sequence for number 27:

27 82 41 124 62 31 94 47 142 71

214 107 322 161 484 242 121 364 182 91

274 137 412 206 103 310 155 466 233 700

350 175 526 263 790 395 1186 593 1780 890

445 1336 668 334 167 502 251 754 377 1132

566 283 850 425 1276 638 319 958 479 1438

719 2158 1079 3238 1619 4858 2429 7288 3644 1822

911 2734 1367 4102 2051 6154 3077 9232 4616 2308

1154 577 1732 866 433 1300 650 325 976 488

244 122 61 184 92 46 23 70 35 106

53 160 80 40 20 10 5 16 8 4

2 1

Sequence length = 112

The longest sequence is for 77031, it has a sequence length of 351.

</pre>