recursion - Determinig all leafs nodes in a tree -



recursion - Determinig all leafs nodes in a tree -

can guys help me method? had homecoming before didnt work either

private string leafnodes(treenode root, string leafs){ if (root.isleaf()) { leafs += integer.tostring(root.getdata()); } else { if(root.getleft() != null) { leafs += leafnodes(root.getleft(), leafs); } if (root.getright() != null) { leafs += leafnodes(root.getright(), leafs); } homecoming leafs; } homecoming leafs; }

the problem pass leafs children , add together result current string same leaf can appear several times in returned string. can prepare way:

private string leafnodes(treenode root){ string leaves = ""; if (root.isleaf()) { leaves = integer.tostring(root.getdata()); } else { if(root.getleft() != null) { leaves += leafnodes(root.getleft()); } if (root.getright() != null) { leaves += leafnodes(root.getright()); } } homecoming leaves; }

recursion data-structures binary-tree

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