无限循环小数求循环节,1/N,M/N

https://blog.csdn.net/MamiyaHasaki/article/details/120644325?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0.pc_relevant_default&spm=1001.2101.3001.4242.1&utm_relevant_index=3