From 67c91e467624984771982fbf4d305acc2c27b10b Mon Sep 17 00:00:00 2001
From: SinghAkhileshwar <97844509+SinghAkhileshwar@users.noreply.github.com>
Date: Fri, 14 Oct 2022 18:05:10 +0530
Subject: [PATCH] Added BFS

---
 cpp/BFS.cpp | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 cpp/BFS.cpp

diff --git a/cpp/BFS.cpp b/cpp/BFS.cpp
new file mode 100644
index 0000000..fce318a
--- /dev/null
+++ b/cpp/BFS.cpp
@@ -0,0 +1,62 @@
+#include<bits/stdc++.h>
+using namespace std;
+class Graph
+{
+	int V;
+	vector<list<int>> adj;
+public:
+	Graph(int V); 
+	void addEdge(int v, int w);
+	void BFS(int s);
+};
+
+Graph::Graph(int V)
+{
+	this->V = V;
+	adj.resize(V);
+}
+
+void Graph::addEdge(int v, int w)
+{
+	adj[v].push_back(w); 
+}
+
+void Graph::BFS(int s)
+{
+	vector<bool> visited;
+	visited.resize(V,false);
+	list<int> queue;
+	visited[s] = true;
+	queue.push_back(s);
+
+	while(!queue.empty())
+	{
+		s = queue.front();
+		cout << s << " ";
+		queue.pop_front();
+		for (auto adjecent: adj[s])
+		{
+			if (!visited[adjecent])
+			{
+				visited[adjecent] = true;
+				queue.push_back(adjecent);
+			}
+		}
+	}
+}
+int main()
+{
+	Graph g(4);
+	g.addEdge(0, 1);
+	g.addEdge(0, 2);
+	g.addEdge(1, 2);
+	g.addEdge(2, 0);
+	g.addEdge(2, 3);
+	g.addEdge(3, 3);
+
+	cout << "Following is Breadth First Traversal "
+		<< "(starting from vertex 2) \n";
+	g.BFS(2);
+
+	return 0;
+}