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Khan Hanoi Towers
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| julia> function hanoi(n, source, dest, spare) | |
| if n == 1 | |
| println("Move disk 1 from rod $source to rod $dest") | |
| else n >= 2 | |
| hanoi(n - 1, source, spare, dest) | |
| println("Move disk $n from rod $source to rod $dest") | |
| hanoi(n - 1, spare, dest, source) | |
| end | |
| end | |
| hanoi (generic function with 1 method) | |
| julia> hanoi(3, "A", "B", "C") | |
| Move disk 1 from rod A to rod B # step 1, recurse | |
| Move disk 2 from rod A to rod C # step 2, recurse | |
| Move disk 1 from rod B to rod C # step 3, recurse | |
| Move disk 3 from rod A to rod B # base case, n == 1 | |
| Move disk 1 from rod C to rod A # step 1, recurse | |
| Move disk 2 from rod C to rod B # step 2, recurse | |
| Move disk 1 from rod A to rod B # step 3, recurse | |
| julia> hanoi(4, "A", "B", "C") | |
| Move disk 1 from rod A to rod C # step 1 | |
| Move disk 2 from rod A to rod B # step 2 | |
| Move disk 1 from rod C to rod B # step 3 | |
| Move disk 3 from rod A to rod C # base case | |
| Move disk 1 from rod B to rod A # 1 | |
| Move disk 2 from rod B to rod C # 2 | |
| Move disk 1 from rod A to rod C # 3 | |
| Move disk 4 from rod A to rod B # base case | |
| Move disk 1 from rod C to rod B # 1 | |
| Move disk 2 from rod C to rod A # 2 | |
| Move disk 1 from rod B to rod A # 3 | |
| Move disk 3 from rod C to rod B # base case | |
| Move disk 1 from rod A to rod C # 1 | |
| Move disk 2 from rod A to rod B # 2 | |
| Move disk 1 from rod C to rod B # 3 | |
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