二叉树-哈弗曼树的应用，键盘输入一连串的字符串，最好不要超过10个，回车后输出相应的频率，同时，根据左历变，按顺序序输出频率的！！很简单-Binary Tree - Havermann Tree Application 已通过测试。 -The application of the binary tree- Ha Fuman tree, keyboard input a series of strings, it is best not more than 10 Enter the corre