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*What does it mean for a char to be signed? [http://stackoverflow.com/questions/451375/what-does-it-mean-for-a-char-to-be-signed] (Peter Liu)
*This thread contains Tips to make sure your code is cross-compatible [http://stackoverflow.com/questions/3451537/c-cross-platform-code] (Lucas Passarella)
*Unsigned keyword in C++ [http://stackoverflow.com/questions/2099830/unsigned-keyword-in-c] (Peter Liu)
*Use of Nested C++ Classes to Hide Implementation Details [http://stackoverflow.com/questions/4571355/nested-classes-c] (Peter Liu)