采用邻接表表示法创建无向图

//采用邻接表表示法创建无向图
#include <iostream>
using namespace std;

#define MVNnm 100
#define OK 1

typedef char VerTexType;
typedef int OtherInfo;

typedef struct ArcNode {
    int adjvex;
    struct ArcNode* nextarc;
    OtherInfo info;
}ArcNode;

typedef struct VNode {
    VerTexType data;
    ArcNode* firstarc;
}VNode, adjList[MVNnm];

typedef struct {
    adjList vertices;
    int vexnum, arcnum;
}ALGraph;


int LocateVex(ALGraph G, VerTexType v) {
    for (int i = 0;i < G.vexnum;++i) {
        if (G.vertices[i].data == v) {
            return i;
        }
    }
    return -1;
}

int CreatUDG(ALGraph& G) {
    int i, k;
    cout << "请输入总顶点数，总边数中间以空格隔开:";
    cin >> G.vexnum >> G.arcnum;
    cout << endl;

    for (i = 0;i < G.vexnum;++i) {
        cout << "请输入第" << (i + 1) << "个点的名称:";
        cin >> G.vertices[i].data;
        G.vertices[i].firstarc = NULL;
    }
    cout << endl;

    cout << "请输入一条边依附的顶点,如 a b" << endl;
    for (k = 0;k < G.arcnum;++k) {
        VerTexType v1, v2;
        int i, j;
        cout << "请输入第" << (k + 1) << "条边依附的顶点:";
        cin >> v1 >> v2;
        i = LocateVex(G, v1);
        j = LocateVex(G, v2);

        ArcNode* p1 = new ArcNode;
        p1->adjvex = j;
        p1->nextarc = G.vertices[i].firstarc;
        G.vertices[i].firstarc = p1;

        ArcNode* p2 = new ArcNode;
        p2->adjvex = j;
        p2->nextarc = G.vertices[j].firstarc;
        G.vertices[j].firstarc = p2;
    }
    return OK;
}

int main() {
    cout << "采用邻接表表示法创建无向图" << endl;
    ALGraph G;
    CreatUDG(G);
    int i;

    cout << endl;
    cout << "邻接表表示法创建的无向图" << endl;

    for (i = 0;i < G.vexnum;i++) {
        VNode temp = G.vertices[i];
        ArcNode* p = temp.firstarc;
        if (p == NULL) {
            cout << G.vertices[i].data;
            cout << endl;
        }
        else {
            cout << temp.data;
            while (p) {
                cout << "->";
                cout << p->adjvex;
                p = p->nextarc;
            }
        }
        cout << endl;
    }
    return 0;
}

来源：https://www.cnblogs.com/ygjzs/p/11877588.html