public GraphWeithedAdjAlt0(string fileName)
{
string filePath = Utils.GetFullFilePath(fileName);
try
{
using (StreamReader reader = new StreamReader(filePath))
{
string line;
int iGraph = -1;
int countVerticles;
int countEdges = 0;
line = reader.ReadLine();
Count = int.Parse(line);
Graphs = new GraphAdjAlt1[Count];
while ((line = reader.ReadLine()) != null)
{
if (line == "")
{
continue;
}
if (countEdges == 0)
{
iGraph++;
string[] args = line.Split(' ');
countVerticles = int.Parse(args[0]);
countEdges = int.Parse(args[1]);
Graphs[iGraph] = new GraphAdjAlt1();
Graphs[iGraph].v = new List<WeightEdge1>[countVerticles];
for (int i = 0; i < Graphs[iGraph].v.Length; i++)
{
Graphs[iGraph].v[i] = new List<WeightEdge1>();
}
continue;
}
string[] edge = line.Split(' ');
int v0 = int.Parse(edge[0]) - 1;
int v1 = int.Parse(edge[1]) - 1;
int w = int.Parse(edge[2]);
Graphs[iGraph].v[v0].Add(new WeightEdge1() { VertexTo = v1, Weight = w});
countEdges--;
}
}
}
catch (Exception e)
{
Console.WriteLine("The file could not be read:");
Console.WriteLine(e.Message);
}
}
private static int ShortestPathsExits(GraphAdjAlt1 g, int s)
{
int n = g.v.Length;
dist = new int[n];
for (int i = 0; i < n; i++)
{
dist[i] = Int32.MaxValue;
}
dist[s] = 0;
for (int i = 0; i < n - 1; i++)
{
haveChanging = false;
for (int v = 0; v < n; v++)
{
if (g.v[v] == null)
{
continue;
}
foreach (WeightEdge1 e in g.v[v])
{
Update(v, e);
if (haveChanging == false)
{
break;
}
}
}
if (haveChanging == false)
{
break;
}
}
for (int v = 0; v < n; v++)
{
if (g.v[v] == null)
{
continue;
}
foreach (WeightEdge1 e in g.v[v])
{
Update(v, e);
if (haveChanging == false)
{
return -1;
}
}
}
return 1;
}
private static int BellmanFordAlgorithm(GraphAdjAlt1 g, int s)
{
return ShortestPathsExits(g, s);
}
