Merge pull request #23 from htsai010/master

fixed links and code character
Updated example4.cpp to be put in
Updated grammar
Fixed grammar
Merge pull request #24 from lpeng003/master

Ex4
removed unneeded source files and used the one that was needed
Merge branch 'master' of https://github.com/khiguera/cppcheckTutorial
explanation
Merge pull request #25 from afan004/master

explanation & Formatting