Question

What am I missing, My program won't give me any outputs. I am also getting an error "constructor class cannot applied given types" like that.

我们的教训是关于深度优先搜索和二进制图，但我错误地不上课，所以现在我后悔了。请有人帮助我。

我无法添加一些细节，因为我真的不知道这个程序是如何工作的，所以我真的很抱歉。

public class MainDriver{

    public static void main(String[] args) {

        Graph mygraph = new Graph(22);
        mygraph.addEdge(1,2);
        mygraph.addEdge(2,4);
        mygraph.addEdge(2,5);
        mygraph.addEdge(4,8);
        mygraph.addEdge(4,9);
        mygraph.addEdge(8,16);
        mygraph.addEdge(8,17);
        mygraph.addEdge(9,18);
        mygraph.addEdge(9,19);
        mygraph.addEdge(5,10);
        mygraph.addEdge(5,11);
        mygraph.addEdge(10,20);
        mygraph.addEdge(10,21);
        mygraph.addEdge(1,3);
        mygraph.addEdge(3,6);
        mygraph.addEdge(3,7);
        mygraph.addEdge(6,12);
        mygraph.addEdge(6,13);
        mygraph.addEdge(7,14);
        mygraph.addEdge(7,15);


    }

     DepthFirstSearch dfs = new DepthFirstSearch(G,v );



}


----------

Here's my subclass

public class DepthFirstSearch{

private boolean[] marked;
private int count;

public DepthFirstSearch(Graph G, int s) {
    marked = new boolean[G.getV()];
    dfs(G, s);


}




private void dfs(Graph G, int v) {

    marked[v] = true;
    System.out.print(v);
    count++;

    for (int w : G.adj(v)) {
        if (!marked[w]) {
            dfs(G, w);
        }

    }


}

public boolean marked(int w) {
    return marked[w];

}


public int count() {
    return count;
}

}

Answer 1

您的程序不会输出任何内容，因为您的代码不会输出任何内容。

我只能假设你应该实施自己的＆＃34; Printing＆＃34;或＆＃34;绘图＆＃34;功能。

如果你想在输出上看到某些东西（任何东西），就这样做：

public static void main(String[] args) {

    System.out.println("START");

    Graph mygraph = new Graph(22);
    mygraph.addEdge(1,2);
    ...

    mygraph.addEdge(7,15);
    System.out.println("END");

}

你应该得到输出：

START
END

为什么我的程序没有给我输出？

1 个答案: