C++ Graphs

I have an assignment to make a minimm spanning tree. As always I am dealing with a textbook (Frank Carrino, Data abstraction & Problem solving)that gives pseudocode that I dont understand. Can any one point me in a direction to learn this from scratch. how to store, create, traverse, .etc like a person with limited knowledge. All the websites i have seen , assume you know alot already, im just looking for a good explanation of how. I know the what already.

Given that an algorithm is pretty much the most obvious and painfully-drawn-out explanation of a procedure that there is, I don't know how much more we can add. Do you have a question about what a tree and/or a graph is? What?