Added Code for BFS of Graph

BFS of Graph.cpp

@@ -0,0 +1,62 @@
+//BFS of Graph
+
+#include<bits/stdc++.h>
+using namespace std;
+
+class Solution
+{
+    public:
+    //Function to return Breadth First Traversal of given graph.
+	vector<int>bfsOfGraph(int V, vector<int> adj[])
+	{
+	    // Code here4
+	    vector<int>v;
+	    vector<int>visited(V,0);
+        queue<int>q;
+        q.push(0);
+        visited[0]=1;
+        while(!q.empty())
+        {
+            int u=q.front();
+            q.pop();
+            v.push_back(u);
+            for(auto x:adj[u])
+            {
+                if(visited[x]==0)
+                {
+                    visited[x]=1;
+                    q.push(x);
+                }
+            }
+        }
+	    return v;
+	}
+};
+
+int main(){
+	int tc;
+	cin >> tc;
+	while(tc--){
+		int V, E;
+    	cin >> V >> E;
+
+    	vector<int> adj[V];
+
+    	for(int i = 0; i < E; i++)
+    	{
+    		int u, v;
+    		cin >> u >> v;
+    		adj[u].push_back(v);
+    // 		adj[v].push_back(u);
+    	}
+        // string s1;
+        // cin>>s1;
+        Solution obj;
+        vector<int>ans=obj.bfsOfGraph(V, adj);
+        for(int i=0;i<ans.size();i++){
+        	cout<<ans[i]<<" ";
+        }
+        cout<<endl;
+	}
+	return 0;
+}  // } Driver Code Ends