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-rw-r--r--sem3/algo/workshop2/dfs/dfs.c166
1 files changed, 82 insertions, 84 deletions
diff --git a/sem3/algo/workshop2/dfs/dfs.c b/sem3/algo/workshop2/dfs/dfs.c
index aa80519..b2ce82b 100644
--- a/sem3/algo/workshop2/dfs/dfs.c
+++ b/sem3/algo/workshop2/dfs/dfs.c
@@ -12,99 +12,97 @@ int step;
void dfs_visit(graph_t *g, vertex_t *u, bool doprint)
{
- if ( doprint ) {
- printf("dfs_visit( %s )\n", u->ref);
- }
- step++;
- u->dtime = step;
- u->color = COLOR_GRAY;
-
- // For every adj
- edge_t *e = u->adj;
- while ( e ) {
- vertex_t *v = e->to;
- if ( v->color == COLOR_WHITE ) {
- graph_edge(&newg, v->ref, u->ref, 1);
- dfs_visit(g, v, doprint);
- }
- e = e->next;
- }
-
- u->color = COLOR_BLACK;
- step++;
- u->ftime = step;
+ if (doprint) {
+ printf("dfs_visit( %s )\n", u->ref);
+ }
+ step++;
+ u->dtime = step;
+ u->color = COLOR_GRAY;
+
+ // For every adj
+ edge_t *e = u->adj;
+ while (e) {
+ vertex_t *v = e->to;
+ if (v->color == COLOR_WHITE) {
+ graph_edge(&newg, v->ref, u->ref, 1);
+ dfs_visit(g, v, doprint);
+ }
+ e = e->next;
+ }
+
+ u->color = COLOR_BLACK;
+ step++;
+ u->ftime = step;
}
-
void dfs(graph_t *g, bool doprint)
{
- step = 0;
-
- // For every edge
- vertex_t *u = vertex_next(g, NULL);
- while ( u ) {
- if ( u->color == COLOR_WHITE ) {
- dfs_visit(g, u, doprint);
- }
- u = vertex_next(g, u);
- }
+ step = 0;
+
+ // For every edge
+ vertex_t *u = vertex_next(g, NULL);
+ while (u) {
+ if (u->color == COLOR_WHITE) {
+ dfs_visit(g, u, doprint);
+ }
+ u = vertex_next(g, u);
+ }
}
#define BENCH 9999
int main()
{
+ // benchmark
+
+ // Start by generating
+ for (int i = 0; i < BENCH; i++) {
+ char from[5];
+ char to[5];
+ sprintf(from, "%d", i);
+ sprintf(to, "%d", rand() % BENCH);
+ graph_edge(&g, from, to, 1);
+ }
+ FILE *f = fopen("hej.dot", "w");
+ graph_to_dot(f, &g);
+
+ {
+ // Timing start
+ clock_t t;
+ t = clock();
+
+ dfs(&g, true);
+
+ // Timing stop
+ t = clock() - t;
+ double time_taken = ((double)t) / CLOCKS_PER_SEC; // in seconds
+ printf("Dfs took %f seconds\n", time_taken);
+ }
+
+ return 0;
+
+ graph_edge(&g, "hej", "med", 1);
+ graph_edge(&g, "med", "dig", 1);
+ graph_edge(&g, "dig", "hvordan", 1);
+
+ graph_edge(&g, "det", "hvordan", 1);
+ graph_edge(&g, "hvordan", "det", 1);
+
+ graph_to_dot(stdout, &g);
+
+ // Timing start
+ clock_t t;
+ t = clock();
+
+ // Dfs slower when printing.
+ dfs(&g, true);
+
+ // Timing stop
+ t = clock() - t;
+ double time_taken = ((double)t) / CLOCKS_PER_SEC; // in seconds
+ printf("Dfs took %f seconds\n", time_taken);
+
+ //graph_to_dot(stdout, &newg);
- // benchmark
-
- // Start by generating
- for (int i = 0; i < BENCH; i++) {
- char from[5];
- char to[5];
- sprintf(from, "%d", i);
- sprintf(to, "%d", rand() % BENCH);
- graph_edge(&g, from, to, 1);
- }
- FILE *f = fopen("hej.dot", "w");
- graph_to_dot(f, &g);
-
- {
- // Timing start
- clock_t t;
- t = clock();
-
- dfs(&g, true);
-
- // Timing stop
- t = clock() - t;
- double time_taken = ((double)t)/CLOCKS_PER_SEC; // in seconds
- printf("Dfs took %f seconds\n", time_taken);
- }
-
- return 0;
-
- graph_edge(&g, "hej", "med", 1);
- graph_edge(&g, "med", "dig", 1);
- graph_edge(&g, "dig", "hvordan", 1);
-
- graph_edge(&g, "det", "hvordan", 1);
- graph_edge(&g, "hvordan", "det", 1);
-
- graph_to_dot(stdout, &g);
-
- // Timing start
- clock_t t;
- t = clock();
-
- // Dfs slower when printing.
- dfs(&g, true);
-
- // Timing stop
- t = clock() - t;
- double time_taken = ((double)t)/CLOCKS_PER_SEC; // in seconds
- printf("Dfs took %f seconds\n", time_taken);
-
- //graph_to_dot(stdout, &newg);
-
- return 0;
+ return 0;
}