import java.io.File;
import java.io.IOException;
import java.util.Scanner;

public abstract class GraphIO implements Graph{

    /*
     *  pre:  filename is the name of a file containing a description of a
        graph (throws java.io.IOException)

        post: nodes and edges according to the description in
        file filename has been added to g.
     */



    static public void readFile(Graph g,String filename){



        try{
            File readFile = new File("src/egen.txt");

            Scanner myscanner=new Scanner(readFile);
            int n =myscanner.nextInt();
            for(int x=1; x<=n; x++){
                int i =myscanner.nextInt();
                int j=myscanner.nextInt();
                int k=myscanner.nextInt();
                g.addNode(i,j,k);

            }
            while (myscanner.hasNext()){
                int l =myscanner.nextInt();
                int m =myscanner.nextInt();
                int p =myscanner.nextInt();
                g.addEdge(l,m,p);
            }
            myscanner.close();
        }
        catch (IOException e){
            System.out.println("error in readFile ");

        }





    }



}