public Graph(string fileName)
{
StreamReader reader = File.OpenText(fileName);
string line = reader.ReadLine();
if (line == null)
{
throw new ArgumentException("Graph file is empty");
}
if (!int.TryParse(line, out int n))
{
throw new ArgumentException("The file does not start with integral graph size");
}
int[] weights = new int[n * (n - 1) / 2];
for (int i = 0; i < n - 1; i++)
{
line = reader.ReadLine();
if (line == null)
{
throw new ArgumentException("Too few lines in the graph file");
}
string[] items = line.Split(',');
if (items.Length != n - i - 1)
{
throw new ArgumentException(string.Format("Too few elements in line {0}", i + 1));
}
for (int j = i + 1; j < n; j++)
{
int ind = j - i - 1;
if (!int.TryParse(items[ind], out int w))
{
throw new ArgumentException(string.Format("Incorrect entry {0} on line {1}", i + 1, ind));
}
weights[(i * (2 * n - 1 - i)) / 2 + ind] = w;
}
}
VertexCount = n;
Weights = new AdjTriangle(weights, VertexCount);
Name = Path.GetFileName(fileName);
}
public Graph(int[] adjTriangle, int vertexCount, string name)
{
Weights = new AdjTriangle(adjTriangle, vertexCount);
VertexCount = vertexCount;
Name = name;
}