邻接表创建无向表(C++ 代码)

#include<iostream>//邻接表创建无向表
#define MVNum 100
using namespace std;
typedef char VerTexType;
typedef struct Arcnode//边节点
{int adjvex;//该边所指向的顶点的位置struct Arcnode* nextarc;//指向下一条边的指针
}Arcnode;
typedef struct vnode//顶点节点
{VerTexType data;//顶点信息Arcnode* firstarc;//指向第一条依附该顶点的边的指针
}Vnode,AdjList[MVNum];
typedef struct//图
{AdjList vertices;//头顶点int vexnum, arcnum;//图当前顶点数和边数
}ALGraph;
int LocateVex(ALGraph G, VerTexType u)
{for (int i = 0; i < G.vexnum; i++)if (u == G.vertices[i].data) return i;return -1;
}
bool CreateUDG(ALGraph& G)
{cin >> G.vexnum >> G.arcnum;//输入总顶点数，总边数for (int i = 0; i < G.vexnum; i++)//输入各点，构造表头结点表{cin >> G.vertices[i].data;//输入顶点值G.vertices[i].firstarc = NULL;//初始化表头节点指针域}VerTexType v1, v2;for (int k = 0; k < G.arcnum; k++){cin >> v1 >> v2;//输入边相邻节点int i = LocateVex(G, v1);int j = LocateVex(G, v2);//确定v1,v2位置Arcnode* p1,*p2;p1 = new Arcnode;//生成一个新的边节点p1->adjvex = j;//邻节点序号为jp1->nextarc = G.vertices[i].firstarc;G.vertices[i].firstarc = p1;//将新节点插入顶点vi的边表头部p2 = new Arcnode;p2->adjvex = i;//邻接点序号为ip2->nextarc = G.vertices[j].firstarc;G.vertices[j].firstarc = p2;//将新节点插入顶点vj的表头部}return 1;
}
bool Print(ALGraph& G)
{cout << "邻接表：" << endl;for (int i = 0; i < G.vexnum; i++){cout << G.vertices[i].data << " ";while (G.vertices[i].firstarc != NULL){cout << G.vertices[G.vertices[i].firstarc->adjvex].data << " ";G.vertices[i].firstarc = G.vertices[i].firstarc->nextarc;}cout << endl;}return 1;
}
int main()
{ALGraph G;CreateUDG(G);Print(G);
}