Towers of Hanoi: Difference between revisions
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=={{header|Tcl}}== |
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The use of <code>interp alias</code> shown is a sort of closure: keep track of the number of moves required |
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<lang tcl>interp alias {} hanoi {} do_hanoi 0 |
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proc do_hanoi {count n {from A} {to C} {via B}} { |
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if {$n == 1} { |
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interp alias {} hanoi {} do_hanoi [incr count] |
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puts "$count: move from $from to $to" |
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} else { |
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incr n -1 |
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hanoi $n $from $via $to |
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hanoi 1 $from $to $via |
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hanoi $n $via $to $from |
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} |
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} |
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hanoi 4</lang> |
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produces |
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<pre>1: move from A to B |
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2: move from A to C |
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3: move from B to C |
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4: move from A to B |
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5: move from C to A |
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6: move from C to B |
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7: move from A to B |
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8: move from A to C |
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9: move from B to C |
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10: move from B to A |
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11: move from C to A |
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12: move from B to C |
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13: move from A to B |
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14: move from A to C |
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15: move from B to C</pre> |
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=={{header|Toka}}== |
=={{header|Toka}}== |
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