/// <summary>
/// 模拟NFA在给定文本上的运行轨迹
/// </summary>
public bool recognizes(string txt)
{
List<int> pc = new List<int>();//表示从reg某一位可达的后续位置
GraphDFS dfs = new GraphDFS(G, 0);//先计算从0开始可达的所有状态
for (int v = 0; v < G.GetV(); v++)
if (dfs.hasPathTo(v))
pc.Add(v);
for (int i = 0; i < txt.Length; i++)
{
List<int> match = new List<int>();//match表示txt字符在reg中匹配后，下一位txt字符去匹配的reg位置
foreach (int v in pc)
if (v < M)
if (re[v] == txt[i] || re[v] == '.')
match.Add(v + 1);//因为是给下一匹配用的，所以要加1
pc = new List<int>();
dfs = new GraphDFS(G, match);
for (int v = 0; v < G.GetV(); v++)//重新计算目前reg所在位置的后续所有可达状态
if (dfs.hasPathTo(v))
pc.Add(v);
}
foreach (int v in pc)
if (v == M)
return true;//到达了正则的最后一位，表示匹配
return false;//不匹配
}
public TranstiveClosure(Graph G)
{
all = new GraphDFS[G.GetV()];
for (int i = 0; i < G.GetV(); i++)
{
all[i] = new GraphDFS(G, i);
}
}
public TranstiveClosure(Graph G)
{
all = new GraphDFS[G.GetV()];
for (int i = 0; i < G.GetV(); i++)
all[i] = new GraphDFS(G, i);
}