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例如要存储一下有向图: ![](https://box.kancloud.cn/2016-03-02_56d657e95a91c.jpg) 当输入6个顶点,8条弧 1 2 1 3 2 4 3 4 3 5 4 1 4 6 5 6 建立的邻接表的流程图为: ![](https://box.kancloud.cn/2016-03-02_56d657e970cc3.jpg) ![](https://box.kancloud.cn/2016-03-02_56d657e98bf31.jpg) ![](https://box.kancloud.cn/2016-03-02_56d657e9b1e04.jpg) ![](https://box.kancloud.cn/2016-03-02_56d657e9e6567.jpg) ![](https://box.kancloud.cn/2016-03-02_56d657ea1024b.jpg) ![](https://box.kancloud.cn/2016-03-02_56d657ea2e27a.jpg) ![](https://box.kancloud.cn/2016-03-02_56d657ea54915.jpg) ![](https://box.kancloud.cn/2016-03-02_56d657ea76386.jpg) 实现代码: ~~~ /* 用邻接表存储n个顶点m条弧的有向图 */ #include<stdio.h> #include<stdlib.h> #define MAX 10005 typedef struct ArcNode { int adjvex; struct ArcNode * nextarc; }ArcNode; typedef struct VNode { int vertex; ArcNode * firstarc; }VNode; int n,m; VNode V[MAX]; void init() { ArcNode * p; for(int i=1;i<=n;i++) { V[i].vertex=i; V[i].firstarc=NULL; } for(int i=0;i<m;i++) { int a,b; scanf("%d%d",&a,&b); p=(ArcNode*)malloc(sizeof(ArcNode)); p->adjvex=b; p->nextarc=V[a].firstarc; V[a].firstarc=p; } } int main() { while(scanf("%d%d",&n,&m)!=EOF&&(n||m)) { init(); ArcNode * p; ArcNode * q; for(int i=1;i<=n;i++) { printf("%d",V[i].vertex); p=V[i].firstarc; while(p!=NULL) { printf(" %d",p->adjvex); q=p; p=p->nextarc; free(q); } printf("\n"); } } return 0; } ~~~