操作用邻接表存储的图



int OutDegree(ALGraph *G,int v){    ArcNode *p;    int n=0;    p=G->adjlist[v].firstarc;    while (p!=NULL)    {        n++;        p=p->nextarc;    }    return n;}//输出图G中每个顶点的出度void OutDs(ALGraph *G){    int i;    for (i=0; i<G->n; i++)        printf("  顶点%d:%d\n",i,OutDegree(G,i));}//输出图G中出度最大的一个顶点void OutMaxDs(ALGraph *G){    int maxv=0,maxds=0,i,x;    for (i=0; i<G->n; i++)    {        x=OutDegree(G,i);        if (x>maxds)        {            maxds=x;            maxv=i;        }    }    printf("顶点%d，出度=%d\n",maxv,maxds);}//输出图G中出度为0的顶点数void ZeroDs(ALGraph *G){    int i,x;    for (i=0; i<G->n; i++)    {        x=OutDegree(G,i);        if (x==0)            printf("%2d",i);    }    printf("\n");}//返回图G中是否存在边<i,j>bool Arc(ALGraph *G, int i,int j){    ArcNode *p;    bool found = false;    p=G->adjlist[i].firstarc;    while (p!=NULL)    {        if(p->adjvex==j)        {            found = true;            break;        }        p=p->nextarc;    }    return found;}

（2）main函数：#include"head.h"int main(){    ALGraph *G;    int A[7][7]=    {        {0,1,1,1,0,0,0},        {0,0,0,0,1,0,0},        {0,0,0,0,1,1,0},        {0,0,0,0,0,0,1},        {0,0,0,0,0,0,0},        {0,0,0,1,1,0,1},        {0,1,0,0,0,0,0}    };    ArrayToList(A[0], 7, G);    printf("(1)各顶点出度:\n");    OutDs(G);    printf("(2)最大出度的顶点信息:");    OutMaxDs(G);    printf("(3)出度为0的顶点:");    ZeroDs(G);    printf("(4)边<2,6>存在吗？");    if(Arc(G,2,6))        printf("是\n");    else        printf("否\n");    printf("\n");    return 0;}

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