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Monday, 26 January 2015

Graph BFS implementation in C++

                                  BFS(Breadth First Search)


                                              

#include<bits/stdc++.h>
using namespace std;
class Graph
{
int V;
list<int> *adj;
public:
       Graph(int V);
       void addEdge(int v,int w);
       void BFS(int src);
};
Graph::Graph(int V)
{
this->V=V;
adj=new list<int>[V];
}
void Graph::addEdge(int v,int w)
{
adj[v].push_back(w);
}
void Graph::BFS(int src)
{
bool *visited=new bool[V];
for(int i=0;i<V;i++)
visited[i]=false;
list<int> queue;
queue.push_back(src);
list<int>::iterator t;
visited[src]=true;
while(!queue.empty())
{
int src=queue.front();
queue.pop_front();
cout<<src<<" ";
for(t=adj[src].begin();t!=adj[src].end();t++)
{
if(!visited[*t])
{
visited[*t]=true;
queue.push_back(*t);
}
}}
}
int main()
{
Graph g(6);
g.addEdge(0,1);
g.addEdge(0,2);
g.addEdge(0,3);
g.addEdge(3,4);
g.addEdge(2,5);
g.BFS(0);
return 0;
}

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Working With Java Collections