add CMakeLists
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.h
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Update AreaConverter.cpp
Added CTestTests.txt
add some tests
Update converter.cpp
google style