#!./parrot -C
#
# ./parrot -C takfp.pir N         (N = 10 for shootout)
# by Joshua Isom
# changed default value to N=7 (shootout default before being deprecated)
# anyway N=10 froze my laptop. Karl Forner

.sub main :main
	.param pmc argv
	.local int argc, n
	argc = argv
	n = 7
	unless argc == 2 goto argsok
	$S0 = argv[1]
	n = $S0
argsok:
	.local num f
	$N0 = n
	$N0 *= 3
	$N1 = n
	$N1 *= 2
	$N2 = n
	$N2 *= 1
	f = Tak($N0, $N1, $N2)
	$P0 = new 'FixedFloatArray'
	$P0 = 1
	$P0[0] = f
	$S0 = sprintf "%.1f\n", $P0
	print $S0
.end

.sub Tak
	.param num x
	.param num y
	.param num z
	unless y >= x goto endif
	.return(z)
endif:
	.local num tmp
	tmp = x - 1
	$N0 = Tak(tmp, y, z)
	tmp = y - 1
	$N1 = Tak(tmp, z, x)
	tmp = z - 1
	$N2 = Tak(tmp, x, y)
	.tailcall Tak($N0, $N1, $N2)
.end


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#   mode: pir
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# End:
# vim: expandtab shiftwidth=4 ft=pir:
