数据结构中图的建立及算法实现

发布网友 发布时间：2022-04-19 09:43

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热心网友 时间：2022-04-19 01:32

#include<stdio.h>
#include<stdlib.h>
#define MaxSize 20
struct ArcNode
{
int adjvex;
struct ArcNode *nextarc;
};
struct Vnode
{
int data;
struct ArcNode *firstarc;
};
struct Vnode AdjList[MaxSize];
int m,n,v,cord;
void main()
{
void creatgraph(struct Vnode A[MaxSize]);
void dfs(struct Vnode A[MaxSize]);
do
{
printf("\n 主菜单");
printf("\n 1 建立无向图的邻接表");
printf("\n 2 按深度遍历图");
printf("\n 3 结束程序运行");
printf("\n-----------------------------------");
printf("\n 请输入您的选择 1, 2, 3 -->");
scanf("%d",&cord);
switch(cord)
{
case 1:
creatgraph(AdjList);
break;
case 2:
dfs(AdjList);
break;
case 3:
exit(0);
}
}while(cord<=3);
}//main end
void creatgraph(struct Vnode A[MaxSize])
{
int i,j,k;
struct ArcNode *p;
printf("input arces and vexes:");
scanf("%d %d",&m,&n);
for(k=0;k<n;k++)
{
printf("\ninput arc:");
scanf("%d%d",&i,&j);
p=(struct ArcNode*)malloc(sizeof(struct ArcNode));
p->adjvex=j;
p->nextarc=A[i-1].firstarc;
A[i-1].firstarc=p;
p=(struct ArcNode*)malloc(sizeof(struct ArcNode));
p->adjvex=i;
p->nextarc=A[j-1].firstarc;
A[j-1].firstarc=p;
}
printf("\n");
for(k=0;k<n;k++)
{
printf("%d",A[k].data);
p=A[k].firstarc;
while(p)
{
printf("%d",p->adjvex);
p=p->nextarc;
}
printf("\n");
}
}///creatgraph end
void dfs(struct Vnode A[MaxSize])
{
struct ArcNode *p,*ar[MaxSize];
int x,i,y,top=-1;
int visited[MaxSize];
for(i=0;i<n;i++)
visited[i]=0;
printf("\ninput x:");
scanf("%d",&x);
printf("%d",x);
visited[x-1]=1;
p=A[x-1].firstarc;
while((p)||(top>=0))
{
if(!p)
{
p=ar[top];
top--;
}
y=p->adjvex;
if(visited[y-1]==0)
{
visited[y-1]=1;
printf("->%d",y);
p=p->nextarc;
if(p)
{
top++;
ar[top]=p;
}
p=A[y-1].firstarc;
}
else p=p->nextarc;
}
}