private int Cost(Node n1, Node n2)
{
NodePair np = new NodePair(n1, n2);
if(costTable.ContainsKey(np)) return costTable[np];
else Console.WriteLine("Error: Unable to find path cost!");
return -1;
}
private void AddToCostTable(string name_1, string name_2, int cost)
{
NodePair nPair = new NodePair(name_1, name_2);
if(!costTable.ContainsKey(nPair)){
costTable.Add(nPair, cost);
}else{
Console.WriteLine("ERROR: Several roads between the same cities!");
}
}