5. Implement a document in English word frequency statistics analysis system, can require for any period of document statistics given in English letters, Numbers, the number of Spaces, and map or table is given, at the same time can rival dynamic input the letters and words of word frequency statistics, ask for the corresponding algorithm time complexity analysis,
An experiment to do this? Need, drives homework, the teacher had not learned data structure, yet the teacher is too stubborn to the data structure of homework!! ! Genuflect is begged!!!!!