public void Test_Pre()
{
DepthFirstOrder order = new DepthFirstOrder(this.CreateDigraph());
AssertUtilities.Sequence(new Int32[6] {
0, 3, 4, 5, 1, 2
}, order.Pre());
}
public Topological(Digraph g)
{
DirectedCycle cycle = new DirectedCycle(g);
if (!cycle.HasCycle())
{
DepthFirstOrder dfs = new DepthFirstOrder(g);
order = dfs.Pre();
}
}
void Start()
{
Digraph G = new Digraph(txt);
DepthFirstOrder dfs = new DepthFirstOrder(G);
print(" v pre post");
print("--------------");
string str = null;
for (int v = 0; v < G.V(); v++)
{
str += (v + " " + dfs.Pre(v) + " " + dfs.Post(v) + "\n");
}
print(str);
str = "Preorder: ";
foreach (int v in dfs.Pre())
{
str += (v + " ");
}
print(str);
str = "Postorder: ";
foreach (int v in dfs.Post())
{
str += (v + " ");
}
print(str);
str = "Reverse postorder: ";
foreach (int v in dfs.reversePost())
{
str += (v + " ");
}
print(str);
}
public void Run()
{
Console.WriteLine("Choose file:"); // Prompt
Console.WriteLine("1 - tinyDAG.txt"); // Prompt
Console.WriteLine("or quit"); // Prompt
var fileNumber = Console.ReadLine();
string fileName;
switch (fileNumber)
{
case "1":
fileName = "tinyDAG.txt";
break;
case "quit":
return;
default:
return;
}
var @in = new In($"Files\\Graphs\\{fileName}");
var lines = @in.ReadAllLines();
var lineIterator = 0;
var v = 0;
var e = 0;
var edges = new List <EdgeD>();
foreach (var line in lines)
{
if (lineIterator == 0)
{
v = Convert.ToInt32(line);
}
if (lineIterator == 1)
{
e = Convert.ToInt32(line);
}
if (lineIterator > 1)
{
var lineSplitted = line.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
var ve = Convert.ToInt32(lineSplitted[0]);
var we = Convert.ToInt32(lineSplitted[1]);
var edge = new EdgeD(ve, we);
edges.Add(edge);
}
lineIterator++;
}
var digraph = new Digraph(v, e, edges);
Console.WriteLine(digraph);
var dfs = new DepthFirstOrder(digraph);
Console.WriteLine(" v pre post");
Console.WriteLine("--------------");
for (var vi = 0; vi < digraph.V; vi++)
{
Console.Write($"{vi} {dfs.Pre(vi)} {dfs.Post(vi)}{Environment.NewLine}");
}
Console.Write("Preorder: ");
foreach (int vi in dfs.Pre())
{
Console.Write($"{vi} ");
}
Console.WriteLine();
Console.Write("Postorder: ");
foreach (int vi in dfs.Post())
{
Console.Write($"{vi} ");
}
Console.WriteLine();
Console.Write("Reverse postorder: ");
foreach (int vi in dfs.ReversePost())
{
Console.Write($"{vi} ");
}
Console.ReadLine();
}