From dbe3b0d89a6d8ea675779bfaa8cb49ce2683795d Mon Sep 17 00:00:00 2001
From: Elijah Opoku-Nyarko <elijah.opoku-nyarko@gordon.edu>
Date: Tue, 26 Apr 2022 12:37:55 -0400
Subject: [PATCH] BFS traversal on the province - Ignoring bridges

---
 province.cc | 41 +++++++++++++++++++++++++++++++++++++++++
 province.h  |  7 +++++++
 2 files changed, 48 insertions(+)

diff --git a/province.cc b/province.cc
index eb09948..793dcab 100644
--- a/province.cc
+++ b/province.cc
@@ -318,3 +318,44 @@ void Province::minSpan(std::ostream & output) const {
     output << _towns[minSpanTree[i]._tail]._name << std::endl;
   }
 }
+
+std::vector<int> Province::bfs(int start) const {
+  // Initialize list of towns scheduled to visit
+  bool scheduled[_numberOfTowns];
+  for (int i = 0; i < _numberOfTowns; i ++) {
+    scheduled[i] = false;
+  }
+
+  // Initialize list of towns to visit with starting town
+  std::queue<int> toVisit;
+  toVisit.push(start);
+
+  scheduled[start] = true;
+  std::vector<int> results;
+
+  // While all towns have not been visited
+  while (!toVisit.empty()) {
+
+    // Remove current town from queue, add to results
+    int current = toVisit.front();
+    toVisit.pop();
+    results.push_back(current);
+
+    // Iterate over neighbors to current town
+    for (Town::RoadList::iterator neighbor =
+        _towns[current]._roads.begin();
+      neighbor != _towns[current]._roads.end();
+      neighbor ++) {
+
+      // If neighbor is not bridge and is not scheduled,
+      // add to results and schedule
+      if (!neighbor->_isBridge && !scheduled[neighbor->_head]) {
+        toVisit.push(neighbor->_head);
+        scheduled[neighbor->_head] = true;
+      }
+    }
+  }
+
+  return results;
+}
+
diff --git a/province.h b/province.h
index a5ce1c7..fcd773f 100644
--- a/province.h
+++ b/province.h
@@ -54,7 +54,14 @@ class Province
 private:
 
 	int smallest(double dist [], std::list <int> toVisit, int numTowns) const;
+
+	/**
+	* Conduct a breadth-first traversal on the province, ignoring bridges
+	* @param start Index of town to start traversal at
+	* @return - List of indices of towns in order of traversal
+ 	*/
   std::vector<int> bfs(int start) const;
+  
   void dfsAux(int current, std::vector<int> & dfsTowns, bool visited []) const;
 
   /**