// does the id[] array contain the strongly connected components?
private boolean check(Digraph G) {
TransitiveClosure tc = new TransitiveClosure(G);
for (int v = 0; v < G.V(); v++) {
for (int w = 0; w < G.V(); w++) {
if (stronglyConnected(v, w) != (tc.reachable(v, w) && tc.reachable(w, v)))
return false;
}
}
return true;
}
/**
* Unit tests the {@code TransitiveClosure} data type.
*
* @param args the command-line arguments
*/
public static void main(String[] args) {
In in = new In(args[0]);
Digraph G = new Digraph(in);
TransitiveClosure tc = new TransitiveClosure(G);
// print header
StdOut.print(" ");
for (int v = 0; v < G.V(); v++)
StdOut.printf("%3d", v);
StdOut.println();
StdOut.println("--------------------------------------------");
// print transitive closure
for (int v = 0; v < G.V(); v++) {
StdOut.printf("%3d: ", v);
for (int w = 0; w < G.V(); w++) {
if (tc.reachable(v, w)) StdOut.printf(" T");
else StdOut.printf(" ");
}
StdOut.println();
}
}