创建静态，动态的三叉霍夫曼树和编码，有向无环图的创建及拓扑排序，双向循环链表，表达式求值，单链表，集合在一起-Create static and dynamic Huffman tree of the trigeminal and coding, directed acyclic graph creation and topological sort, two-way circulation list, expression evaluation, single-chain, together