Merge pull request #2 from ds-sww/master

...
size,isEmpty,get,add,remove
fix bugs of remove()
first homework
first commit
修改了文件目录
抽象出了checkSize方法
发现remove忘记返回值了...
commit by 13301730309
sommit by 13307130309
commit by 13307130309
Merge pull request #1 from ds-sww/master

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Assignment1
Merge pull request #2 from ds-sww/master

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assignmet3_133071308280_TA
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Merge pull request #148 from SiuTo/assignment1

13307130319_LIANGXIAOTAO_assignment1 [ Initial Commit ]
Merge pull request #146 from qini7/assignment3

[Initial Commit] 13307130280_ShizhengQin_assignment3
Merge pull request #145 from Minjun-Li/master

13307130316_Liminjun_Assignment3[Initial Commit]