add a README file
Merge branch 'master' of https://github.com/lts9165/Simple-Calculator.git
Merge branch 'master' of https://github.com/lts9165/Simple-Calculator.git
hello the rabbit
Merge branch 'master' of https://github.com/lts9165/Simple-Calculator.git
delete the readme
Merge pull request #4 from lts9165/master

hello the rabbit