重复文件统计：记录C:/盘中所有在不同路径中出现的相同文件及所出现的位置和文件大小（只出现一次的文件不统计），并输出统计结果至文本文档。-Duplicate file statistics: Record C:/disk all the different paths that appear in the same file and the occurrence and file size (only once the files are not statistics), and output