private IEnumerable <IDirectedEdge> cycle; //edgeTo中是否含有负权重环
public BellmanFordSP(IEdgeWeightedDIgraph G, int s) : base(G, s)
{
onQ = new bool[G.V];
queue = new Chapter1.Queue <int>();
queue.Enqueue(s);
onQ[s] = true;
while (!queue.IsEmpty && !HasNegativeCycle())
{
int v = queue.Dequeue();
onQ[v] = false;
Relax(G, v);
}
}
private void Bfs(IGraph g, int s)
{
var queue = new Chapter1.Queue <int>();
marked[s] = true; //起点被标记
queue.Enqueue(s);
while (!queue.IsEmpty)
{
int v = queue.Dequeue(); //从队列中删除一个顶点
foreach (int w in g.Adj(v))
{
if (!marked[w])
{
edgeTo[w] = v;
marked[w] = true;
queue.Enqueue(w);
}
}
}
}