BFS(Breadth First Search)广度优先搜素，正在调试...

 

#include <iostream>
#include <vector>
#include <list>
#include <queue>
#include <set>
#include <cstdlib>
#include <stack>
usingnamespace std;
void bfs(vector<  list<int>>& adj_lists,int  start_node)
{    
    queue<int> not_yet_explored;    
    set<int> discovered;   
 //标记起始点为已发现，并将其放入队列开始搜索        
 not_yet_explored.push(start_node);    
 discovered.insert(start_node);   
 while(!not_yet_explored.empty())   
 {       
     //获取一个新的结点并依次作为基点进行探索   
int node_to_explore=not_yet_explored.front();      
     
     not_yet_explored.pop();     
     
     //检测该点所有的边  
     list<int>::iterator edges = adj_lists[node_to_explore].begin();  
     for( ; edges != adj_lists[node_to_explore].end() ;edges++ );     
     {           
         if(discovered.count(*edges) ==0)        
         {               
             //发现新的结点将其加入队列         
         discovered.insert(*edges);               
         not_yet_explored.push(*edges);             
         cout<<"Found"<<*edges <<" from "<<node_to_explore<<endl;     
    
         }      
     }   
 }
}

//DFS
void dfs_helper(vector< list <int>>& adj_lists , set<int>& discovered , int node)
{
    //检查该点所有的边
    list<int>::iterator edges = adj_lists[node].begin();
    for (;edges!=adj_lists[node].end();edges++)
    {
        //检查某条边是否含有未发现的顶点
if(discovered.count(*edges)==0)
        {
            discovered.insert(*edges);
            cout<<"Found "<<*edges<<" from "<< node<<endl;
            dfs_helper(adj_lists,discovered ,*edges);
        }
    }
}

 void dfs(vector< list<int>>& adj_lists ,int start_node)
 {
     //标记顶点为已被发现
set<int> discovered;
     discovered.insert(start_node);
     dfs_helper(adj_lists,discovered ,start_node);
 }


void main()
{   
    //初始化图的信息  
    
    vector< list<int>> g(7, list<int>());      
        
         
    g[0].push_back(2);
         g[0].push_back(1);  
         
         g[1].push_back(0);   
         g[1].push_back(2);   

         g[2].push_back(0);  
         g[2].push_back(1);  
         g[2].push_back(3);   
         g[2].push_back(4);  
         
         g[3].push_back(2);    
         g[3].push_back(4);    
         g[3].push_back(5);   
         
         g[4].push_back(2);    
         g[4].push_back(3); 
         g[4].push_back(5);   
         g[4].push_back(6); 

         g[5].push_back(3);  
         g[5].push_back(4);   

         g[6].push_back(4);   

         cout<<"BFS"<<endl;    
         bfs(g,0);   
         cout<<  endl<<"DFS"<<endl;
         //dfs(g,0);
         
}