pgm16_08.txt

c#版本 算法大全 几乎所有常见的算法 This file contains the C# code from Program

//
//   This file contains the C# code from Program 16.8 of
//   "Data Structures and Algorithms
//    with Object-Oriented Design Patterns in C#"
//   by Bruno R. Preiss.
//
//   Copyright (c) 2001--2002 by Bruno R. Preiss, P.Eng.  All rights reserved.
//
//   http://www.brpreiss.com/books/opus6/programs/pgm16_08.txt
//
public abstract class AbstractGraph : AbstractContainer, Graph
{
    protected int numberOfVertices;
    protected int numberOfEdges;
    protected Vertex[] vertex;

    public virtual void DepthFirstTraversal(
	PrePostVisitor visitor, int start)
    {
	bool[] visited = new bool[numberOfVertices];
	for (int v = 0; v < numberOfVertices; ++v)
	    visited[v] = false;
	DepthFirstTraversal(visitor, vertex[start], visited);
    }

    protected virtual void DepthFirstTraversal(
	PrePostVisitor visitor, Vertex v, bool[] visited)
    {
	if (visitor.IsDone)
	    return;
	visitor.PreVisit(v);
	visited[v.Number] = true;
	foreach (Vertex to in v.Successors)
	{
	    if (!visited[to.Number])
		DepthFirstTraversal(visitor, to, visited);
	}
	visitor.PostVisit(v);
    }
    // ...
}