/** * Unit tests the {@code DepthFirstOrder} data type. * * @param args the command-line arguments */ public static void main(String[] args) { In in = new In(args[0]); Digraph G = new Digraph(in); DepthFirstOrder dfs = new DepthFirstOrder(G); StdOut.println(" v pre post"); StdOut.println("--------------"); for (int v = 0; v < G.V(); v++) { StdOut.printf("%4d %4d %4d\n", v, dfs.pre(v), dfs.post(v)); } StdOut.print("Preorder: "); for (int v : dfs.pre()) { StdOut.print(v + " "); } StdOut.println(); StdOut.print("Postorder: "); for (int v : dfs.post()) { StdOut.print(v + " "); } StdOut.println(); StdOut.print("Reverse postorder: "); for (int v : dfs.reversePost()) { StdOut.print(v + " "); } StdOut.println(); }