How can I append int variable to string to print path of my DFS algorithm?-CodePudding

I am trying to print the path through a graph made by my DFS algorithm. I am having errors which I do not understand.

void GraphTraversal::printPath(std::vector<const Node *> &path)
{
    string myPath;
    
     for(int i = 0; i<path.size(); i  )
     {
    
        string dfspath = to_string(dfspath[i].getNodeID()); // i get an error here - expression must have class type but it has type "char"
        std::cout<<dfspath; 
     }
     paths.insert(myPath);
}

I have coded my DFS algorithm as such.

void GraphTraversal::DFS(set<const Node *> &visited, vector<const Node *> &path, const Node *src, const Node *dst)
{
    visited.insert(src);
    path.push_back(src);
    if (src == dst) 
    {
       printPath();
    }

    for(const auto &e: src->getOutEdges())
    {
        if(!visited.count(e->getDst())){
        DFS( visited, path, e->getDst(), dst);
        }
    }
    visited.erase(src);
    path.pop_back();
}

The output I would like from my printPath method is for string singlePath to output "START: 1->2->4->5->END" with the digits being the nodeID.

CodePudding user response：

You declare a string variable named path, but your parameter is already named path.

So path[i] actually refers to the string, not to the vector.

Also, path[i] is a const Node*, so you must call it's function with : path[i]->getNodeID().