类接收一个 char const * 作为参数（如何在代码中声明 txt.）

Question

my Problem is that I try to write a code to do an algorithm in a graph. Our prof gave us a header with classes and functions, that can construct a graph.

Graph::Graph(char const * filename, DirType dtype)

You see that the second argument is if the graph is directed or not, but my Problem is that I have to take a txt. data (in which the graph is described (#of nodes, all edges etc.)) and give it as an argument to the class.

A year ago I did a similar task but I can't remember how I gave my txt data as an argument into the class but it was something like:

graph.txt

main(){
   ... = graph.txt
   Graph g(..., Graph::directed);

thanks in advance to everyone that wants to help me!

Answer 1

The argument is called filename , which suggests you're just supposed to pass… a filename.

Graph g("graph.txt", Graph::directed);

That's it.