C++ class实现邻接矩阵存储的图(完整代码)

代码如下:

#include <iostream>
#include <queue>
using namespace std;
typedef int VertexType;
typedef int EdgeType;
const int MaxVertexNum = 30;class MGraph
{public:MGraph(){CreatGraph();};void CreatGraph();void Visit(int v);void BFS(int v);void BFStraverse();void DFStraverse();bool Ispath_BFS(int i, int j);//判断结点i和结点j之间是否有路径bool Ispath_DFS(int i, int j);//判断结点i和结点j之间是否有路径void Init_vis();
private:void DFS(int i, int j, bool &flag);void dfs_graph(int i);VertexType vertexs[MaxVertexNum];EdgeType arcs[MaxVertexNum][MaxVertexNum];int vertexnum;int edgenum;bool vis[MaxVertexNum];
};void MGraph::CreatGraph()
{Init_vis();int a1, a2;cout << "请输入图的顶点个数和边的条数" << endl;cin >> vertexnum >> edgenum;cout << "请依次输入按序号0到n顶点的中存储的信息" << endl;for (int i = 0; i < vertexnum; i++) cin >> vertexs[i];for (int i = 0; i < vertexnum; i++)for (int j = 0; j < vertexnum; j++)arcs[i][j] = 0;cout << "请输入边的信息(该图以有向图的邻接矩阵存储方式存储)" << endl;for (int i = 0; i < edgenum; i++){cin >> a1 >> a2;arcs[a1][a2] = 1;//若加入arcs[a2][a1] = 1，则为无向图}
}void MGraph::Init_vis()
{for (int i = 0; i < MaxVertexNum; i++) vis[i] = false;
}void MGraph::Visit(int v)
{cout << vertexs[v] << " ";
}void MGraph::BFS(int v)
{queue<int >q;q.push(v);vis[v] = true;while (q.size()){int t = q.front();Visit(t);q.pop();for (int i = 0; i < vertexnum; i++){if (arcs[t][i] == 1 && vis[i] == false){vis[i] = true;q.push(i);}}}cout << endl;Init_vis();
}void MGraph::BFStraverse()
{queue<int >q;for (int i = 0; i < vertexnum; i++){if (vis[i] == false){vis[i] = true;q.push(i);while (q.size()){int t = q.front();Visit(t);q.pop();for (int j = 0; j < vertexnum; j++)if (arcs[t][j] == 1 && vis[j] == false){vis[j] = true;q.push(j);}}}}cout << endl;Init_vis();
}void MGraph::dfs_graph(int i)
{Visit(i);for (int j = 0; j < vertexnum; j++){if (arcs[i][j] == 1 && vis[j] == false){vis[j] = true;dfs_graph(j);}}
}void MGraph::DFStraverse()
{for (int i = 0; i < vertexnum; i++){if (vis[i] == false){vis[i] = true;dfs_graph(i);}}cout << endl;Init_vis();
}bool MGraph::Ispath_BFS(int i, int j)
{queue<int >q;vis[i] = true;q.push(i);while (q.size()){int t = q.front();q.pop();if (t == j){Init_vis();return true;}for (int k = 0; k < vertexnum; k++){if (arcs[t][k] == 1 && vis[k] == false){vis[k] = true;q.push(k);}}}Init_vis();return false;
}void MGraph::DFS(int i, int j, bool &flag)
{if (i == j){flag = true;return;}for (int k = 0; k < vertexnum; k++){if (arcs[i][k] == 1 && vis[k] == false){vis[k] = true;DFS(k, j, flag);vis[k] = false;}}
}bool MGraph::Ispath_DFS(int i, int j)
{bool flag = false;vis[i] = true;DFS(i, j, flag);Init_vis();if (flag) return true;else return false;
}int main()
{MGraph g;int v;cin >> v;g.BFS(v);g.BFStraverse();g.DFStraverse();int a,b, c;while (cin >> a >> b >> c, a){if (a == 1)if (g.Ispath_BFS(b, c)) cout << "bfs:" << b << " and " << c << "yes" << endl;else cout << "bfs:" << b << " and  " << c << "no" << endl;else if (a == 2)if (g.Ispath_DFS(b, c)) cout << "dfs:" << b << " and " << c << "yes" << endl;else cout << "dfs:" << b << " and " << c << "no" << endl;}return 0;
}

测试结果:

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