commit assignment 1 and assignment 2#6

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chintan2871 wants to merge 3 commits intoInformationWorks:masterfrom

chintan2871:master

Commits on May 1, 2014

commit assignment a and assignment 2
chintan2871
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Commits on May 5, 2014

change of document file and make rb file in executable file
chintan2871
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Commits on May 6, 2014

make a code in command line argument
chintan2871
committed