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bc Calculator

The Towers of Hanoi as a script for the bc Calculator tool on UNIX.

bc is a language that supports arbitrary precision numbers with interactive execution of statements. More details are available at the GNU bc home page.

/* * The Towers Of Hanoi * bc * Copyright (C) 1998 Amit Singh. All Rights Reserved. * http://hanoi.kernelthread.com * * Tested under GNU bc 1.04 */ define moveit(i, j) { print "move " print i print " --> " print j print "\n" } define dohanoi(n, h, d, o) { if (n > 0) { silence = dohanoi(n-1, h, o, d) silence = moveit(h, d) silence = dohanoi(n-1, o, d, h) } } define hanoi(n) { silence = dohanoi(n, 1, 3, 2) }

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hanoi.bc