顶点和数据元素相关联：
每个顶点关联着一个字符串，这个就是顶点的数据，这个数据关联着工程意义。
添加MatrixGraph.h文件：
1 #ifndef MATRIXGRAPH_H
2 #define MATRIXGRAPH_H
3
4 #include "Graph.h"
5 #include "Exception.h"
6 #include "DynamicArray.h"
7
8 namespace DTLib
9 {
10 // V是顶点类型，E是边的类型
11 template < int N, typename V, typename E >
12 class MatrixGraph : public Graph<V, E>
13 {
14 protected:
15 V* m_vertexes[N];
16 E* m_edges[N][N];
17 int m_eCount;
18 public:
19 MatrixGraph()
20 {
21 for(int i = 0; i < vCount(); i++)
22 {
23 m_vertexes[i] = NULL;
24
25 for( int j = 0; j < vCount(); j++)
26 {
27 m_edges[i][j] = NULL;
28 }
29 }
30
31 m_eCount = 0;
32 }
33
34 V getVertex(int i)
35 {
36 V ret;
37
38 if( !getVertex(i, ret) )
39 {
40 THROW_EXCEPTION(InvalidParameterException, "Index i is invalid...");
41 }
42
43 return ret;
44 }
45
46 bool getVertex(int i, V& value)
47 {
48 bool ret = ((0 <= i) && (i < vCount()));
49
50 if( ret )
51 {
52 if( m_vertexes[i] != NULL )
53 {
54 value = *(m_vertexes[i]);
55 }
56 else
57 {
58 THROW_EXCEPTION(InvalidOperationException, "No value assigned to this vertex...");
59 }
60 }
61
62 return ret;
63 }
64 bool setVertex(int i, const V& value)
65 {
66 bool ret = ((0 <= i) && (i < vCount()));
67
68 if( ret )
69 {
70 V* data = m_vertexes[i];
71
72 if( data == NULL )
73 {
74 data = new V();
75 }
76
77 if( data != NULL )
78 {
79 *data = value;
80
81 m_vertexes[i] = data; //引入data为了异常安全
82 }
83 else
84 {
85 THROW_EXCEPTION(NoEnoughMemoryException, "No memory to store new vertex value...");
86 }
87 }
88
89 return ret;
90 }
91
92 SharedPointer< Array<int> > getAdjacent(int i) //获取i的邻接顶点
93 {
94 DynamicArray<int>* ret = NULL;
95
96 if( (0 <= i) && (i < vCount()) )
97 {
98 int n = 0;
99
100 for(int j = 0; j < vCount(); j++)
101 {
102 if( m_edges[i][j] != NULL )
103 {
104 n++;
105 }
106 }
107
108 ret = new DynamicArray<int>(n);
109
110 if( ret != NULL )
111 {
112 for(int j=0,k=0; j<vCount(); j++)
113 {
114 if( m_edges[i][j] != NULL )
115 {
116 ret->set(k++, j);
117 }
118 }
119 }
120 else
121 {
122 THROW_EXCEPTION(NoEnoughMemoryException, "No memory to create new ret object...");
123 }
124 }
125 else
126 {
127 THROW_EXCEPTION(InvalidParameterException, "Index i is invalid...");
128 }
129
130 return ret;
131 }
132
133 E getEdge(int i, int j)
134 {
135 E ret;
136
137 if( !getEdge(i, j, ret) )
138 {
139 THROW_EXCEPTION(InvalidParameterException, "Index <i,j> is invalid...");
140 }
141
142 return ret;
143 }
144
145 bool getEdge(int i, int j, E& value)
146 {
147 bool ret = ((0 <= i) && (i < vCount()) &&
148 (0 <= j) && (j < vCount()) );
149
150 if( ret )
151 {
152 if( m_edges[i][j] != NULL )
153 {
154 value = *(m_edges[i][j]);
155 }
156 else
157 {
158 THROW_EXCEPTION(InvalidOperationException, "No value assigned to this edge...");
159 }
160 }
161
162 return ret;
163 }
164
165 bool setEdge(int i, int j, const E& value)
166 {
167 bool ret = ((0 <= i) && (i < vCount()) &&
168 (0 <= j) && (j < vCount()) );
169
170 if( ret )
171 {
172 E* ne = m_edges[i][j];
173
174 if( ne == NULL )
175 {
176 //i和j之间没有边，现在要设置一条边
177 ne = new E();
178
179 if( ne != NULL )
180 {
181 *ne = value;
182
183 m_edges[i][j] = ne;
184
185 m_eCount++;
186 }
187 else
188 {
189 THROW_EXCEPTION(NoEnoughMemoryException, "No memory to store new edge value...");
190 }
191 }
192 else
193 {
194 *ne = value;
195 }
196 }
197
198 return ret;
199 }
200
201 bool removeEdge(int i, int j)
202 {
203 bool ret = ((0 <= i) && (i < vCount()) &&
204 (0 <= j) && (j < vCount()) );
205
206 if( ret )
207 {
208 E* toDel = m_edges[i][j];
209
210 m_edges[i][j] = NULL;
211
212 if( toDel != NULL )
213 {
214 m_eCount--;
215
216 delete toDel;
217 }
218 }
219
220 return ret;
221 }
222
223 int vCount()
224 {
225 return N;
226 }
227
228 int eCount()
229 {
230 return m_eCount;
231 }
232
233 int OD(int i)
234 {
235 int ret = 0;
236
237 if( (0 <= i) && (i < vCount()) )
238 {
239 for(int j = 0; j < vCount(); j++)
240 {
241 if( m_edges[i][j] != NULL )
242 {
243 ret++;
244 }
245 }
246 }
247 else
248 {
249 THROW_EXCEPTION(InvalidParameterException, "Index i is invalid...");
250 }
251
252 return ret;
253 }
254
255 int ID(int i)
256 {
257 int ret = 0;
258
259 if( (0 <= i) && (i < vCount()) )
260 {
261 for(int j = 0; j < vCount(); j++)
262 {
263 if( m_edges[j][i] != NULL )
264 {
265 ret++;
266 }
267 }
268 }
269 else
270 {
271 THROW_EXCEPTION(InvalidParameterException, "Index i is invalid...");
272 }
273
274 return ret;
275 }
276
277 ~MatrixGraph()
278 {
279 for(int i = 0; i < vCount(); i++)
280 {
281 for( int j = 0; j < vCount(); j++)
282 {
283 delete m_edges[i][j];
284 }
285
286 delete m_vertexes[i];
287 }
288 }
289 };
290
291 }
292
293 #endif // MATRIXGRAPH_H
测试程序如下：
1 #include <iostream>
2 #include "BTreeNode.h"
3 #include "MatrixGraph.h"
4
5 using namespace std;
6 using namespace DTLib;
7
8
9 int main()
10 {
11 MatrixGraph<3, int, int> g;
12
13 g.setEdge(0, 1, 1);
14 g.setEdge(1, 0, 2);
15 g.setEdge(1, 2, 3);
16
17 cout << "vCount : " << g.vCount() << endl;
18 cout << "eCount : " << g.eCount() << endl;
19 cout << "ID(1) : " << g.ID(1) << endl;
20 cout << "OD(1) : " << g.OD(1) << endl;
21 cout << "TD(1) : " << g.TD(1) << endl;
22
23 cout << "W(0, 1) : " << g.getEdge(0, 1) << endl;
24 cout << "W(1, 0) : " << g.getEdge(1, 0) << endl;
25 cout << "W(1, 2) : " << g.getEdge(1, 2) << endl;
26
27 SharedPointer< Array<int> > aj = g.getAdjacent(1); //获取1顶点的邻接顶点
28
29 cout << endl;
30 for(int i = 0; i < aj->length(); i++)
31 {
32 cout << (*aj)[i] << " ";
33 }
34
35 cout << endl;
36
37 cout << "delete edge : " << endl;
38 g.removeEdge(0, 1);
39
40 cout << "eCount : " << g.eCount() << endl;
41
42 g.setVertex(0, 100);
43
44 cout << "V(0) : " << g.getVertex(0) << endl;
45
46 cout << "W(0, 1) : " << g.getEdge(0, 1) << endl;
47 return 0;
48 }
结果如下：
小结：
原文地址：https://www.cnblogs.com/wanmeishenghuo/p/9704205.html
时间： 2024-08-30 14:46:50