你的mins应该定义成局部变量，而不是全局变量
> #include <iostream>
> using namespace std;
> 
> //图定义
> int arc[101][101]={0};
> int visited[101]={0};
> int low[101] = {0};
> int counts=0;
> int total[101]={0};
> int nodes=0;
> int mins=0;
> 
> int next(int v)
> {
> 	for(int i=arc[v][0];i<=nodes;i++)
> 	{
> 		if(arc[v][i] != 0)
> 		{
> 			arc[v][0] = i + 1;
> 			return i;
> 		}
> 	}
> 
> 	return 0;
> }
> 
> void DFS(int v0)
> {
> 	int p=0,w;
> 	visited[v0] = mins = ++counts;
> 	for(p=next(v0); p!=0;p=next(v0))
> 	{
> 		w=p;
> 		if(visited[w] == 0)
> 		{
> 			DFS(w);
> 			if(low[w] < mins) 
> 				mins = low[w];
> 			if(low[w] >= visited[v0])
> 				total[v0]=1;
> 		}
> 		else if(visited[w] < mins) 
> 			mins = visited[w];
> 	}
> 	low[v0] = mins;
> }
> 
> void Finds()
> {
> 	counts=1;
> 	visited[1] = 1;
> //	low[1] = 1;
> 	for(int i=2;i<=nodes;++i)
> 	{
> 		visited[i] = 0;
> 	}
> 	int p = next(1);
> 	int v = p;
> 	DFS(v);
> 
> 	if(counts < nodes)
> 	{
> 		total[1]=1;
> 		p=next(1);
> 		while(p!=0)
> 		{
> 			v = p;
> 			if(visited[v] == 0)
> 				DFS(v);
> 			p = next(1);
> 		}
> 	}
> }
> 
> int main()
> {
> 	int i,f,t,c=0;
> 	char h;
> 	scanf("%d",&nodes);
> 	while(nodes!=0)
> 	{
> 		counts=0;mins=0;
> 		for(i=0;i<=nodes;i++) arc[i][0]=1;
> 		scanf("%d",&f);
> 		while(f!=0)
> 		{
> 			while(scanf("%d%c",&t,&h))
> 			{
> 				arc[f][t] = 1;
> 				arc[t][f] = 1;
> 				if(h=='\n')
> 					break;
> 			}
> 			scanf("%d",&f);
> 		}
> 
> 		Finds();
> 
> 		for(i=1;i<=nodes;i++)
> 			if(total[i])
> 				c++;
> 		cout<<c<<endl;
> 		c=0;
> 		memset(total,0,sizeof(total));
> 		memset(low,0,sizeof(low));
> 		memset(visited,0,sizeof(visited));
> 		memset(arc,0,sizeof(arc));
> 		counts=0;mins=0;
> 	    scanf("%d",&nodes);
> 	}
> 	return 0;
> }