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  1. #include<iostream>
  2. #include<map>
  3. #include<list>
  4. #include<queue>
  5. using namespace std;
  6.  
  7. template<typename T>
  8. class graph{
  9. map<T,list<T> >l;
  10. public:
  11.     void addEdge(int x, int y){
  12.     l[x].push_back(y);
  13.     l[y].push_back(x);
  14.     }
  15.  
  16.     void bfs(T src){
  17.         queue<T>q;
  18.         map<int, bool>visited;
  19.  
  20.         q.push(src);
  21.         visited[src] = true;
  22.  
  23.         while(!q.empty()){
  24.             T node = q.front();
  25.             q.pop();
  26.             cout<<node<<" ";
  27.             for(int nbr: l[node]){
  28.                 if(!visited[nbr]){
  29.                     q.push(nbr);
  30.                     //mark tht nbr as visited
  31.                     visited[nbr] = true;
  32.                 }
  33.             }
  34.         }
  35.     }
  36.  
  37. };
  38. int main()
  39. {
  40. graph<int>g;
  41. g.addEdge(0,1);
  42. g.addEdge(1,2);
  43. g.addEdge(2,3);
  44. g.addEdge(3,4);
  45. g.addEdge(4,5);
  46. g.bfs(0);
  47. return 0;}
  48.  
Success #stdin #stdout 0s 4320KB
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https://ideone.com/nKQdei
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
secret

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