Add HelloWorld.cpp
It's test.
Delete test.txt
备注
TA's solution
Merge pull request #65 from whimsycwd/master

TA's solution
assignment0 commit by 13307130337
Merge pull request #43 from erichuang1994/master

test
clean up and add .DS_Store to gitignore
Merge pull request #70 from whimsycwd/master

clean up and add .DS_Store to gitignore
Merge pull request #63 from GhSapGu/master

assignment0
Merge pull request #68 from explosic4/master

assignment0 commit by 13307130337
Merge https://github.com/ds-sww/codebase

Conflicts:
	.gitignore
...