private static void Graph()
        {
            Graph graph  = new Graph(new Scanner(new StreamReader(File.OpenRead("tinyG.txt"))));
            Graph graph2 = new Graph(new Scanner(new StreamReader(File.OpenRead("tinyCG.txt"))));

            StdOut.Println("输入一个数字: ");
            int     s      = StdIn.ReadInt();
            ISearch search = new DepthFirstSearch(graph, s);

            for (int v = 0; v < graph.V; v++)
            {
                if (search.Marked(v))
                {
                    StdOut.Print(v + " ");
                }
            }
            StdOut.Println();
            StdOut.Println();
            StdOut.Println();

            ICC cc = new DepthFirstSearch(graph, s).InitCC();
            int M  = cc.CountCC();

            StdOut.Println(M + " components");
            Bag <int>[] components = new Bag <int> [M];
            for (int i = 0; i < M; i++)
            {
                components[i] = new Bag <int>();
            }
            for (int v = 0; v < graph.V; v++)
            {
                components[cc.Id(v)].Add(v);
            }
            for (int i = 0; i < M; i++)
            {
                foreach (int v in components[i])
                {
                    StdOut.Print(v + " ");
                }
                StdOut.Println();
            }
            StdOut.Println(cc.HasCycle);

            if (search.Count() != graph.V)
            {
                StdOut.Print("Not ");
            }
            StdOut.Println("connected");

            IPath path = new DepthFirstSearch(graph2, s);

            for (int v = 0; v < graph2.V; v++)
            {
                StdOut.Print(s + " to " + v + ": ");
                if (path.HasPathTo(v))
                {
                    foreach (int x in path.PathTo(v))
                    {
                        if (x == s)
                        {
                            StdOut.Print(x);
                        }
                        else
                        {
                            StdOut.Print("-" + x);
                        }
                    }
                }
                StdOut.Println();
            }


            //符号图
            string       filename  = "routes.txt";
            string       filename2 = "movies.txt";
            string       delim     = "/";
            ISymbolGraph sg        = new SymbolGraph(filename2, delim);
            IGraph       g         = sg.G;

            while (StdIn.HasNextLine())
            {
                StdOut.Println("输入查找的字符串");
                string source = StdIn.ReadLine();
                foreach (int w in g.Adj(sg.Index(source)))
                {
                    StdOut.Println("   " + sg.Name(w));
                }
            }
        }