I need to implement toString to represent a tree like (also each level can be a separate line):
(n1(n11(n111, n112), n12(n121, n122)))
that corresponds to tree hierarchy:
n1
n11 n12
n111 n112 n121 n122

In addition, the method should be based on the loop. I made the method which is work correctly based on recurion. Could help me to convert this method to loop based.
Thx in advanced dear experts !

If we think about the bracket placement, it becomes apparent that they occur whenever a child node is entered or left.

This would correspond to the following points in the pseudo-code:

DFS(G,v) ( v is the vertex where the search starts ) Stack S := {}; ( start with an empty stack ) for each vertex u, set visited[u] := false; push S, v; while (S is not empty) do u := pop S; if (not visited[u]) then // Print '(' // Print node name visited[u] := true; for each unvisited neighbour w of u push S, w; // Print ')' end if end while END DFS()

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