인접 표 토폴로지 정렬

//             ，            ，     
#include<stdio.h>
#include<malloc.h>
#include<stack>
using namespace std;
#define MAX_VERTEX_NUM 20
int visited[100];
typedef struct arcnode
{
	int adjvex;
	struct arcnode *nextarc;
	int info;
}*arcnod,arcnode1;
typedef struct vertexnode
{
	int data;
	arcnode1 *firstarc;
}*vertexnod,vertex;
typedef struct 
{
	vertex ver[MAX_VERTEX_NUM];
	int vexnum,arcnum;
}*adjlist,adjlist1;

int find(adjlist &g,int x)
{
	int x1;
	for(int i=0;i<g->vexnum;i++)
	{
		if(g->ver[i].data==x)
		{
           x1=i;
		   break;
		}
	}
	return x1;
}
void create(adjlist &g)
{
	int i,k=1,x1,x2;
	arcnod s1;
	printf("         : ");
	scanf("%d%d",&g->vexnum,&g->arcnum);
	printf("       : ");
	for(i=0;i<g->vexnum;i++)
	{
		scanf("%d",&g->ver[i].data);
		g->ver[i].firstarc=NULL;
	}
	for(i=0;i<g->arcnum;i++)
	{ 
		adjlist g1,g2;
		g1=g;
		g2=g;
		printf("    %d    ，  ,         : ",k++);
		scanf("%d%d",&x1,&x2);
        int t1=x1,t2=x2;
		x1=find(g1,x1);
		x2=find(g2,x2);
	    s1=(arcnod)malloc(sizeof(arcnode1));
		s1->adjvex=x2;
		s1->nextarc=g->ver[x1].firstarc;
		g->ver[x1].firstarc=s1;
	}
}
void findID(adjlist &g,int indegree[MAX_VERTEX_NUM])
{
	int i;
    arcnod p;
	for(i=0;i<g->vexnum;i++)
	indegree[i]=0;
	for(i=0;i<g->vexnum;i++)
	{
		p=g->ver[i].firstarc;
		while(p!=NULL)
		{
			indegree[p->adjvex]++;
			p=p->nextarc;
		}
	}
}
int toposort(adjlist &g)
{
	stack<int>dsta;
	int indegree[MAX_VERTEX_NUM];
	int i,count,k,k0;
    arcnod p;
	findID(g,indegree);
	for(i=0;i<g->vexnum;i++)
	if(indegree[i]==0)
	dsta.push(i);
	count=0;
	while(!dsta.empty())
	{
		k0=dsta.top();
		dsta.pop();
		printf("%d ",g->ver[k0].data);
		count++;
		p=g->ver[k0].firstarc;
		while(p!=NULL)
		{
			k=p->adjvex;
			indegree[k]--;
			if(indegree[k]==0)
		    dsta.push(k);
			p=p->nextarc;
		}
	}
	if(count<g->vexnum)
		return 0;
	else
		return 1;
}
int main()
{
	adjlist g;
	g=(adjlist)malloc(sizeof(adjlist1));
    create(g);
	int t=toposort(g);
	printf("
[%d]
",t);
	return 0;
}