coding net：https://coding.net/u/yuanyuancheng

git openssh：

四则运算 https://git.coding.net/yuanyuancheng/sizeyunsuan.git

                   ssh：git@git.coding.net:yuanyuancheng/sizeyunsuan.git

词频统计 https://git.coding.net/yuanyuancheng/cipintongji.git

                   ssh：git@git.coding.net:yuanyuancheng/cipintongji.git

补交第一周：coding net