|
|
/**
|
|
|
* File: graph_dfs.js
|
|
|
* Created Time: 2023-02-21
|
|
|
* Author: Zhuo Qinyue (1403450829@qq.com)
|
|
|
*/
|
|
|
|
|
|
const { Vertex } = require('../modules/Vertex');
|
|
|
const { GraphAdjList } = require('./graph_adjacency_list');
|
|
|
|
|
|
/* 深度优先遍历 */
|
|
|
// 使用邻接表来表示图，以便获取指定顶点的所有邻接顶点
|
|
|
function dfs(graph, visited, res, vet) {
|
|
|
res.push(vet); // 记录访问顶点
|
|
|
visited.add(vet); // 标记该顶点已被访问
|
|
|
// 遍历该顶点的所有邻接顶点
|
|
|
for (const adjVet of graph.adjList.get(vet)) {
|
|
|
if (visited.has(adjVet)) {
|
|
|
continue; // 跳过已被访问的顶点
|
|
|
}
|
|
|
// 递归访问邻接顶点
|
|
|
dfs(graph, visited, res, adjVet);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/* 深度优先遍历 */
|
|
|
// 使用邻接表来表示图，以便获取指定顶点的所有邻接顶点
|
|
|
function graphDFS(graph, startVet) {
|
|
|
// 顶点遍历序列
|
|
|
const res = [];
|
|
|
// 哈希集合，用于记录已被访问过的顶点
|
|
|
const visited = new Set();
|
|
|
dfs(graph, visited, res, startVet);
|
|
|
return res;
|
|
|
}
|
|
|
|
|
|
/* Driver Code */
|
|
|
/* 初始化无向图 */
|
|
|
const v = Vertex.valsToVets([0, 1, 2, 3, 4, 5, 6]);
|
|
|
const edges = [
|
|
|
[v[0], v[1]],
|
|
|
[v[0], v[3]],
|
|
|
[v[1], v[2]],
|
|
|
[v[2], v[5]],
|
|
|
[v[4], v[5]],
|
|
|
[v[5], v[6]],
|
|
|
];
|
|
|
const graph = new GraphAdjList(edges);
|
|
|
console.log('\n初始化后，图为');
|
|
|
graph.print();
|
|
|
|
|
|
/* 深度优先遍历 */
|
|
|
const res = graphDFS(graph, v[0]);
|
|
|
console.log('\n深度优先遍历（DFS）顶点序列为');
|
|
|
console.log(Vertex.vetsToVals(res));
|
