"error: Expected a type, got 'classname'" in C++
c++
Solution
`node` is not a class, it's a class template. You need to instantiate it to use it as the element type of `vector`, e.g.,
vector<node<int> > vertices;
(`int` is used as an example; you should use the type you actually need)
Problem
Using the following code: ``` template <typename T> class node { [. . .] }; class b_graph { friend istream& operator>> (istream& in, b_graph& ingraph); friend ostream& operator<< (ostream& out, b_graph& outgraph); public: [...] private: vector<node> vertices; //This line ``` I'm getting: ``` error: type/value mismatch at argument 1 in template parameter list for ‘template<class _Tp, class _Alloc> class std::vector’ error: expected a type, got 'node' error: template argument 2 is invalid ``` On the indicated line. Node is clearly defined before b_graph which uses it - what have I done here?