说明：  根据信源压缩编码——Huffman编码的原理，制作对英文文本进行压缩和解压缩的软件。要求软件有简单的用户界面，软件能够对运行的状态生成报告，分别是：字符频率统计报告、编码报告、压缩程度信息报告、码表存储空间报告。
(According to source coding- Huffman coding theory, the production of English text compression and decompression software. Require a simple software user interface, the software can generate reports to run the state are: character frequency statistics reports, coding reports, the degree of information compression report, the report code table storage space.)