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https://github.com/krahets/hello-algo.git
synced 2026-04-05 03:30:30 +08:00
Format C++ codes in Clang-Format Style: Microsoft
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@@ -7,19 +7,15 @@
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#include "../include/include.hpp"
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/* 基于邻接表实现的无向图类 */
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class GraphAdjList
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{
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public:
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class GraphAdjList {
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public:
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// 邻接表,key: 顶点,value:该顶点的所有邻接顶点
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unordered_map<Vertex *, vector<Vertex *>> adjList;
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/* 在 vector 中删除指定节点 */
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void remove(vector<Vertex *> &vec, Vertex *vet)
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{
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for (int i = 0; i < vec.size(); i++)
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{
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if (vec[i] == vet)
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{
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void remove(vector<Vertex *> &vec, Vertex *vet) {
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for (int i = 0; i < vec.size(); i++) {
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if (vec[i] == vet) {
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vec.erase(vec.begin() + i);
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break;
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}
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@@ -27,11 +23,9 @@ public:
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}
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/* 构造方法 */
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GraphAdjList(const vector<vector<Vertex *>> &edges)
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{
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GraphAdjList(const vector<vector<Vertex *>> &edges) {
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// 添加所有顶点和边
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for (const vector<Vertex *> &edge : edges)
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{
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for (const vector<Vertex *> &edge : edges) {
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addVertex(edge[0]);
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addVertex(edge[1]);
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addEdge(edge[0], edge[1]);
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@@ -39,11 +33,12 @@ public:
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}
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/* 获取顶点数量 */
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int size() { return adjList.size(); }
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int size() {
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return adjList.size();
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}
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/* 添加边 */
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void addEdge(Vertex *vet1, Vertex *vet2)
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{
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void addEdge(Vertex *vet1, Vertex *vet2) {
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if (!adjList.count(vet1) || !adjList.count(vet2) || vet1 == vet2)
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throw invalid_argument("不存在顶点");
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// 添加边 vet1 - vet2
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@@ -52,8 +47,7 @@ public:
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}
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/* 删除边 */
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void removeEdge(Vertex *vet1, Vertex *vet2)
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{
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void removeEdge(Vertex *vet1, Vertex *vet2) {
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if (!adjList.count(vet1) || !adjList.count(vet2) || vet1 == vet2)
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throw invalid_argument("不存在顶点");
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// 删除边 vet1 - vet2
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@@ -62,8 +56,7 @@ public:
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}
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/* 添加顶点 */
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void addVertex(Vertex *vet)
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{
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void addVertex(Vertex *vet) {
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if (adjList.count(vet))
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return;
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// 在邻接表中添加一个新链表
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@@ -71,29 +64,25 @@ public:
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}
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/* 删除顶点 */
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void removeVertex(Vertex *vet)
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{
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void removeVertex(Vertex *vet) {
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if (!adjList.count(vet))
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throw invalid_argument("不存在顶点");
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// 在邻接表中删除顶点 vet 对应的链表
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adjList.erase(vet);
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// 遍历其他顶点的链表,删除所有包含 vet 的边
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for (auto &[key, vec] : adjList)
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{
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remove(vec, vet);
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for (auto &adj : adjList) {
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remove(adj.second, vet);
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}
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}
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/* 打印邻接表 */
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void print()
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{
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void print() {
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cout << "邻接表 =" << endl;
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for (auto &adj : adjList)
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{
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for (auto &adj : adjList) {
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const auto &key = adj.first;
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const auto &vec = adj.second;
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cout << key->val << ": ";
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PrintUtil::printVector(vetsToVals(vec));
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printVector(vetsToVals(vec));
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}
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}
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};
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@@ -9,9 +9,9 @@
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/* Driver Code */
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int main() {
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/* 初始化无向图 */
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vector<Vertex*> v = valsToVets(vector<int> { 1, 3, 2, 5, 4 });
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vector<vector<Vertex*>> edges = { { v[0], v[1] }, { v[0], v[3] }, { v[1], v[2] },
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{ v[2], v[3] }, { v[2], v[4] }, { v[3], v[4] } };
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vector<Vertex *> v = valsToVets(vector<int>{1, 3, 2, 5, 4});
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vector<vector<Vertex *>> edges = {{v[0], v[1]}, {v[0], v[3]}, {v[1], v[2]},
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{v[2], v[3]}, {v[2], v[4]}, {v[3], v[4]}};
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GraphAdjList graph(edges);
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cout << "\n初始化后,图为" << endl;
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graph.print();
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@@ -29,7 +29,7 @@ int main() {
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graph.print();
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/* 添加顶点 */
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Vertex* v5 = new Vertex(6);
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Vertex *v5 = new Vertex(6);
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graph.addVertex(v5);
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cout << "\n添加顶点 6 后,图为" << endl;
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graph.print();
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@@ -11,16 +11,16 @@ class GraphAdjMat {
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vector<int> vertices; // 顶点列表,元素代表“顶点值”,索引代表“顶点索引”
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vector<vector<int>> adjMat; // 邻接矩阵,行列索引对应“顶点索引”
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public:
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public:
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/* 构造方法 */
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GraphAdjMat(const vector<int>& vertices, const vector<vector<int>>& edges) {
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GraphAdjMat(const vector<int> &vertices, const vector<vector<int>> &edges) {
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// 添加顶点
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for (int val : vertices) {
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addVertex(val);
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}
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// 添加边
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// 请注意,edges 元素代表顶点索引,即对应 vertices 元素索引
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for (const vector<int>& edge : edges) {
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for (const vector<int> &edge : edges) {
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addEdge(edge[0], edge[1]);
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}
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}
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@@ -38,7 +38,7 @@ public:
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// 在邻接矩阵中添加一行
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adjMat.emplace_back(n, 0);
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// 在邻接矩阵中添加一列
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for (vector<int>& row : adjMat) {
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for (vector<int> &row : adjMat) {
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row.push_back(0);
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}
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}
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@@ -53,7 +53,7 @@ public:
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// 在邻接矩阵中删除索引 index 的行
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adjMat.erase(adjMat.begin() + index);
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// 在邻接矩阵中删除索引 index 的列
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for (vector<int>& row : adjMat) {
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for (vector<int> &row : adjMat) {
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row.erase(row.begin() + index);
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}
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}
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@@ -84,9 +84,9 @@ public:
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/* 打印邻接矩阵 */
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void print() {
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cout << "顶点列表 = ";
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PrintUtil::printVector(vertices);
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printVector(vertices);
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cout << "邻接矩阵 =" << endl;
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PrintUtil::printVectorMatrix(adjMat);
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printVectorMatrix(adjMat);
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}
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};
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@@ -94,8 +94,8 @@ public:
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int main() {
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/* 初始化无向图 */
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// 请注意,edges 元素代表顶点索引,即对应 vertices 元素索引
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vector<int> vertices = { 1, 3, 2, 5, 4 };
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vector<vector<int>> edges = { { 0, 1 }, { 0, 3 }, { 1, 2 }, { 2, 3 }, { 2, 4 }, { 3, 4 } };
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vector<int> vertices = {1, 3, 2, 5, 4};
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vector<vector<int>> edges = {{0, 1}, {0, 3}, {1, 2}, {2, 3}, {2, 4}, {3, 4}};
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GraphAdjMat graph(vertices, edges);
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cout << "\n初始化后,图为" << endl;
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graph.print();
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@@ -9,13 +9,13 @@
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/* 广度优先遍历 BFS */
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// 使用邻接表来表示图,以便获取指定顶点的所有邻接顶点
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vector<Vertex*> graphBFS(GraphAdjList &graph, Vertex *startVet) {
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vector<Vertex *> graphBFS(GraphAdjList &graph, Vertex *startVet) {
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// 顶点遍历序列
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vector<Vertex*> res;
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vector<Vertex *> res;
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// 哈希表,用于记录已被访问过的顶点
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unordered_set<Vertex*> visited = { startVet };
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unordered_set<Vertex *> visited = {startVet};
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// 队列用于实现 BFS
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queue<Vertex*> que;
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queue<Vertex *> que;
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que.push(startVet);
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// 以顶点 vet 为起点,循环直至访问完所有顶点
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while (!que.empty()) {
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@@ -25,8 +25,8 @@ vector<Vertex*> graphBFS(GraphAdjList &graph, Vertex *startVet) {
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// 遍历该顶点的所有邻接顶点
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for (auto adjVet : graph.adjList[vet]) {
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if (visited.count(adjVet))
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continue; // 跳过已被访问过的顶点
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que.push(adjVet); // 只入队未访问的顶点
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continue; // 跳过已被访问过的顶点
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que.push(adjVet); // 只入队未访问的顶点
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visited.emplace(adjVet); // 标记该顶点已被访问
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}
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}
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@@ -37,18 +37,18 @@ vector<Vertex*> graphBFS(GraphAdjList &graph, Vertex *startVet) {
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/* Driver Code */
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int main() {
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/* 初始化无向图 */
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vector<Vertex*> v = valsToVets({ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 });
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vector<vector<Vertex*>> edges = { { v[0], v[1] }, { v[0], v[3] }, { v[1], v[2] }, { v[1], v[4] },
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{ v[2], v[5] }, { v[3], v[4] }, { v[3], v[6] }, { v[4], v[5] },
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{ v[4], v[7] }, { v[5], v[8] }, { v[6], v[7] }, { v[7], v[8] } };
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vector<Vertex *> v = valsToVets({0, 1, 2, 3, 4, 5, 6, 7, 8, 9});
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vector<vector<Vertex *>> edges = {{v[0], v[1]}, {v[0], v[3]}, {v[1], v[2]}, {v[1], v[4]},
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{v[2], v[5]}, {v[3], v[4]}, {v[3], v[6]}, {v[4], v[5]},
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{v[4], v[7]}, {v[5], v[8]}, {v[6], v[7]}, {v[7], v[8]}};
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GraphAdjList graph(edges);
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cout << "\n初始化后,图为\\n";
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graph.print();
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/* 广度优先遍历 BFS */
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vector<Vertex*> res = graphBFS(graph, v[0]);
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vector<Vertex *> res = graphBFS(graph, v[0]);
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cout << "\n广度优先遍历(BFS)顶点序列为" << endl;
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PrintUtil::printVector(vetsToVals(res));
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printVector(vetsToVals(res));
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// 释放内存
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for (Vertex *vet : v) {
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@@ -8,13 +8,13 @@
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#include "./graph_adjacency_list.cpp"
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/* 深度优先遍历 DFS 辅助函数 */
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void dfs(GraphAdjList& graph, unordered_set<Vertex*>& visited, vector<Vertex*>& res, Vertex* vet) {
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void dfs(GraphAdjList &graph, unordered_set<Vertex *> &visited, vector<Vertex *> &res, Vertex *vet) {
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res.push_back(vet); // 记录访问顶点
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visited.emplace(vet); // 标记该顶点已被访问
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// 遍历该顶点的所有邻接顶点
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for (Vertex* adjVet : graph.adjList[vet]) {
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for (Vertex *adjVet : graph.adjList[vet]) {
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if (visited.count(adjVet))
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continue; // 跳过已被访问过的顶点
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continue; // 跳过已被访问过的顶点
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// 递归访问邻接顶点
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dfs(graph, visited, res, adjVet);
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}
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@@ -22,11 +22,11 @@ void dfs(GraphAdjList& graph, unordered_set<Vertex*>& visited, vector<Vertex*>&
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/* 深度优先遍历 DFS */
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// 使用邻接表来表示图,以便获取指定顶点的所有邻接顶点
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vector<Vertex*> graphDFS(GraphAdjList& graph, Vertex* startVet) {
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vector<Vertex *> graphDFS(GraphAdjList &graph, Vertex *startVet) {
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// 顶点遍历序列
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vector<Vertex*> res;
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vector<Vertex *> res;
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// 哈希表,用于记录已被访问过的顶点
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unordered_set<Vertex*> visited;
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unordered_set<Vertex *> visited;
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dfs(graph, visited, res, startVet);
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return res;
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}
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@@ -34,17 +34,17 @@ vector<Vertex*> graphDFS(GraphAdjList& graph, Vertex* startVet) {
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/* Driver Code */
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int main() {
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/* 初始化无向图 */
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vector<Vertex*> v = valsToVets(vector<int> { 0, 1, 2, 3, 4, 5, 6 });
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vector<vector<Vertex*>> edges = { { v[0], v[1] }, { v[0], v[3] }, { v[1], v[2] },
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{ v[2], v[5] }, { v[4], v[5] }, { v[5], v[6] } };
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vector<Vertex *> v = valsToVets(vector<int>{0, 1, 2, 3, 4, 5, 6});
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vector<vector<Vertex *>> edges = {{v[0], v[1]}, {v[0], v[3]}, {v[1], v[2]},
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{v[2], v[5]}, {v[4], v[5]}, {v[5], v[6]}};
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GraphAdjList graph(edges);
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cout << "\n初始化后,图为" << endl;
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graph.print();
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/* 深度优先遍历 DFS */
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vector<Vertex*> res = graphDFS(graph, v[0]);
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vector<Vertex *> res = graphDFS(graph, v[0]);
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cout << "\n深度优先遍历(DFS)顶点序列为" << endl;
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PrintUtil::printVector(vetsToVals(res));
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printVector(vetsToVals(res));
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// 释放内存
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for (Vertex *vet : v) {
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