Method addNode

java/Chapter 4/Question4_2/Graph.java:11–18

(Node x)

    }
	
    public void addNode(Node x) {
		if (count < 30) {
			vertices[count] = x;
			count++;
		} else {
			System.out.print("Graph full");
		}
    }
    
    public Node[] getNodes() {
        return vertices;