|
|
|
@ -0,0 +1,128 @@
|
|
|
|
|
/**
|
|
|
|
|
* File: graph_adjacency_matrix.ts
|
|
|
|
|
* Created Time: 2023-02-09
|
|
|
|
|
* Author: Zhuo Qinyue (1403450829@qq.com)
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* 基于邻接矩阵实现的无向图类 */
|
|
|
|
|
class GraphAdjMat {
|
|
|
|
|
vertices: number[]; // 顶点列表,元素代表“顶点值”,索引代表“顶点索引”
|
|
|
|
|
adjMat: number[][]; // 邻接矩阵,行列索引对应“顶点索引”
|
|
|
|
|
|
|
|
|
|
/* 构造函数 */
|
|
|
|
|
constructor(vertices: number[], edges: number[][]) {
|
|
|
|
|
this.vertices = [];
|
|
|
|
|
this.adjMat = [];
|
|
|
|
|
// 添加顶点
|
|
|
|
|
for (const val of vertices) {
|
|
|
|
|
this.addVertex(val);
|
|
|
|
|
}
|
|
|
|
|
// 添加边
|
|
|
|
|
// 请注意,edges 元素代表顶点索引,即对应 vertices 元素索引
|
|
|
|
|
for (const e of edges) {
|
|
|
|
|
this.addEdge(e[0], e[1]);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 获取顶点数量 */
|
|
|
|
|
size(): number {
|
|
|
|
|
return this.vertices.length;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 添加顶点 */
|
|
|
|
|
addVertex(val: number): void {
|
|
|
|
|
const n: number = this.size();
|
|
|
|
|
// 向顶点列表中添加新顶点的值
|
|
|
|
|
this.vertices.push(val);
|
|
|
|
|
// 在邻接矩阵中添加一行
|
|
|
|
|
const newRow: number[] = [];
|
|
|
|
|
for (let j: number = 0; j < n; j++) {
|
|
|
|
|
newRow.push(0);
|
|
|
|
|
}
|
|
|
|
|
this.adjMat.push(newRow);
|
|
|
|
|
// 在邻接矩阵中添加一列
|
|
|
|
|
for (const row of this.adjMat) {
|
|
|
|
|
row.push(0);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 删除顶点 */
|
|
|
|
|
removeVertex(index: number): void {
|
|
|
|
|
if (index >= this.size()) {
|
|
|
|
|
throw new RangeError("Index Out Of Bounds Exception");
|
|
|
|
|
}
|
|
|
|
|
// 在顶点列表中移除索引 index 的顶点
|
|
|
|
|
this.vertices.splice(index, 1);
|
|
|
|
|
|
|
|
|
|
// 在邻接矩阵中删除索引 index 的行
|
|
|
|
|
this.adjMat.splice(index, 1);
|
|
|
|
|
// 在邻接矩阵中删除索引 index 的列
|
|
|
|
|
for (const row of this.adjMat) {
|
|
|
|
|
row.splice(index, 1);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 添加边 */
|
|
|
|
|
// 参数 i, j 对应 vertices 元素索引
|
|
|
|
|
addEdge(i: number, j: number): void {
|
|
|
|
|
// 索引越界与相等处理
|
|
|
|
|
if (i < 0 || j < 0 || i >= this.size() || j >= this.size() || i === j) {
|
|
|
|
|
throw new RangeError("Index Out Of Bounds Exception");
|
|
|
|
|
}
|
|
|
|
|
// 在无向图中,邻接矩阵沿主对角线对称,即满足 (i, j) == (j, i)
|
|
|
|
|
this.adjMat[i][j] = 1;
|
|
|
|
|
this.adjMat[j][i] = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 删除边 */
|
|
|
|
|
// 参数 i, j 对应 vertices 元素索引
|
|
|
|
|
removeEdge(i: number, j: number): void {
|
|
|
|
|
// 索引越界与相等处理
|
|
|
|
|
if (i < 0 || j < 0 || i >= this.size() || j >= this.size() || i === j) {
|
|
|
|
|
throw new RangeError("Index Out Of Bounds Exception");
|
|
|
|
|
}
|
|
|
|
|
this.adjMat[i][j] = 0;
|
|
|
|
|
this.adjMat[j][i] = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 打印邻接矩阵 */
|
|
|
|
|
print(): void {
|
|
|
|
|
console.log("顶点列表 = ", this.vertices);
|
|
|
|
|
console.log("邻接矩阵 =", this.adjMat);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* 初始化无向图 */
|
|
|
|
|
// 请注意,edges 元素代表顶点索引,即对应 vertices 元素索引
|
|
|
|
|
const vertices: number[] = [1, 3, 2, 5, 4];
|
|
|
|
|
const edges: number[][] = [[0, 1], [1, 2], [2, 3], [0, 3], [2, 4], [3, 4]
|
|
|
|
|
];
|
|
|
|
|
const graph: GraphAdjMat = new GraphAdjMat(vertices, edges);
|
|
|
|
|
console.log("\n初始化后,图为");
|
|
|
|
|
graph.print();
|
|
|
|
|
|
|
|
|
|
/* 添加边 */
|
|
|
|
|
// 顶点 1, 2 的索引分别为 0, 2
|
|
|
|
|
graph.addEdge(0, 2);
|
|
|
|
|
console.log("\n添加边 1-2 后,图为");
|
|
|
|
|
graph.print();
|
|
|
|
|
|
|
|
|
|
/* 删除边 */
|
|
|
|
|
// 顶点 1, 3 的索引分别为 0, 1
|
|
|
|
|
graph.removeEdge(0, 1);
|
|
|
|
|
console.log("\n删除边 1-3 后,图为");
|
|
|
|
|
graph.print();
|
|
|
|
|
|
|
|
|
|
/* 添加顶点 */
|
|
|
|
|
graph.addVertex(6);
|
|
|
|
|
console.log("\n添加顶点 6 后,图为");
|
|
|
|
|
graph.print();
|
|
|
|
|
|
|
|
|
|
/* 删除顶点 */
|
|
|
|
|
// 顶点 3 的索引为 1
|
|
|
|
|
graph.removeVertex(1);
|
|
|
|
|
console.log("\n删除顶点 3 后,图为");
|
|
|
|
|
graph.print();
|
|
|
|
|
|
|
|
|
|
export {};
|