public class ChainInterator
{
	private ChainNode  now;
	//鏈表遍歷器
		public int Set(Chain  c)
			{//找出first，初始化
				now=c.first;
				if(now!=null)
					return now.data;
				return 0;
			}
			int Next()
			{//若存在，至下一個節點，若仍存在，顯示data
				if(now==null)return 0;
				now=now.link;
				if(now==null)return 0;
				return now.data;
			}
	
}