圖　　數據結構

2019-11-08 18:35:41

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#ifndef _GRAPH_H#define _GRAPH_H#define DEFAULT_VERTEX_SIZE 10template<class Type>class Graph;class Edge{public:Edge(int num):dest(num),link(NULL){}~Edge(){}int dest;Edge* link;};template<class Type>class Vertex{friend Graph<Type>;public:Vertex():data(Type()),adj(NULL){}~Vertex(){}PRivate:Edge *adj;Type data;};template<class Type>class Graph{public:Graph(int sz=DEFAULT_VERTEX_SIZE){MaxVertices=sz>DEFAULT_VERTEX_SIZE?sz:DEFAULT_VERTEX_SIZE;NumVertices=NumEdge=0;NodeTable=new Vertex<Type>[MaxVertices];}~Graph(){Edge *t;for(int i=0;i<NumVertices;++i) { Edge *w; t=NodeTable[i].adj; while(t!=NULL) { w=t; t=t->link; delete w; } } delete[] NodeTable; //////}int GetPosOfVertex(const Type &v)const{ for(int i=0;i<NumVertices;++i) { if(NodeTable[i].data==v) return i; } return -1;}void InsertVertex(const Type &val){if(NumVertices<MaxVertices){ NodeTable[NumVertices++].data=val;}}bool InsertEdge(const Type &vertex1, const Type &vertex2){ int v1 = GetPosOfVertex(vertex1); int v2 = GetPosOfVertex(vertex2); if(v1==-1 || v2==-1) return false; //v1 --> v2 Edge *e = new Edge(v2); e->link = NodeTable[v1].adj; NodeTable[v1].adj = e; //v2 --> v1 e = new Edge(v1); e->link = NodeTable[v2].adj; NodeTable[v2].adj = e; NumEdge++; return true; }/*bool InsertEdge(const Type &v1,const Type &v2){ int V1=GetPosOfVertex(v1); int V2=GetPosOfVertex(v2); if(V1==-1||V2==-1) return false; //v1-->v2 cout<<"v1: "<<V1<<" v2: "<<V2<<endl; Edge *s=new Edge(V2); s->link=NodeTable[V1].adj; NodeTable[V1].adj=s; //v2-->v1 Edge *s1=new Edge(V1); s1->link=NodeTable[V2].adj; NodeTable[V1].adj=s1; ++NumEdge; return true;}*/int NumOfVertex()const{ return NumVertices;}int NumOfEdge()const{ return NumEdge;}int GetFirstNeighbor(const Type &vertex)const{ int v=GetPosOfVertex(vertex); if(v==-1) return -1; if( NodeTable[v].adj!=NULL) return NodeTable[v].adj->dest; else return -1;}int GetNextNeighbor(const Type &vertex1,const Type &vertex2)const{ int v1=GetPosOfVertex(vertex1); int v2=GetPosOfVertex(vertex2); if(v1==-1||v2==-1) return -1; if(NodeTable[v1].adj==NULL) return -1; Edge *t=NodeTable[v1].adj; while(t!=NULL&&t->dest!=v2) t=t->link; if(t==NULL) return -1; else if(t->link!=NULL) return t->link->dest;}bool RemoveEdge(const Type &vertex1,const Type &vertex2){ int v1=GetPosOfVertex(vertex1); int v2=GetPosOfVertex(vertex2); if(v1==-1||v2==-1) return false; Edge *t=NodeTable[v1].adj; Edge *p=t; while(t!=NULL&&t->dest!=v2) { p=t; t=t->link; } if(t==NULL) return false; else { if(p==t) { Edge *w=NodeTable[v1].adj; NodeTable[v1].adj=NodeTable[v1].adj->link; delete w; } else { Edge *w=p->link; p->link=t->link; delete w; } // t=p=NodeTable[v2].adj; while(t->dest!=v1) { p=t; t=t->link; } if(t==p) { Edge *w=NodeTable[v2].adj; NodeTable[v2].adj=NodeTable[v2].adj->link; delete w; } else { Edge *w=p->link; p->link=t->link; delete w; } --NumEdge; return true; }}bool RemoveVertex(const Type &vertex){ int v=GetPosOfVertex(vertex); if(v==-1) return false; Edge* t=NodeTable[v].adj; while(t!=NULL) { Edge *p=NodeTable[t->dest].adj; Edge *p1=p; while(p!=NULL) { while(p->dest!=v) { p1=p; p=p->link; } if(p==p1) { Edge *w=NodeTable[t->dest].adj; NodeTable[t->dest].adj=NodeTable[t->dest].adj->link; delete w; break; } else { Edge* w=p1->link; p1->link=p->link; delete w; break; } } p1=t; t=t->link; delete p1; --NumEdge; } if(v!=NumVertices-1) { NodeTable[v].data=NodeTable[NumVertices-1].data; NodeTable[v].adj=NodeTable[NumVertices-1].adj; Edge *t1=NodeTable[NumVertices-1].adj; while(t1!=NULL) { Edge *p3=NodeTable[t1->dest].adj; while(p3->dest!=NumVertices-1) p3=p3->link; p3->dest=v; t1=t1->link; } } --NumVertices; return true;}void ShowGraph(){ for(int i=0;i<NumVertices;++i) { cout<<i<<" "<<NodeTable[i].data<<" "<<"-->"; Edge* e=NodeTable[i].adj; while(e!=NULL) { cout<<e->dest<<"-->"; e=e->link; } cout<<"NUL"<<endl;; }}private:Vertex<Type>*NodeTable;int MaxVertices;int NumVertices;int NumEdge;};#endif

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