I am investigating the use of the boost graph libraries in order to apply them to various network problems I have in mind.
In the examples I have been looking at the graph edge values ("weights") are always initialized as integers, such as in these Bellman-Ford and Kruskal algorithms eg:
int weights[] = { 1, 1, 2, 7, 3, 1, 1, 1 };
My problem is if I try and change the weights to double, I get a heap of warning messages about conversions etc, which so far I have not been able to figure out how to overcome.
Does anyone see a way around this?
It's caused by a mismatch between the weights[] array and the type used for edge weights by your boost graph/algorithm.
In the first linked sample, eg, you should also change
struct EdgeProperties {
int weight;
};
[...]
property_map<Graph, int EdgeProperties::*>::type
to
struct EdgeProperties {
double weight;
};
[...]
property_map<Graph, double EdgeProperties::*>::type
In the second
typedef adjacency_list < vecS, vecS, undirectedS,
no_property, property < edge_weight_t, int > > Graph;
to
typedef adjacency_list < vecS, vecS, undirectedS,
no_property, property < edge_weight_t, double > > Graph;