Hi, I have uploaded the version of the Boost Ratio library to be review. What is Boost.Ratio? =============== Boost.Ratio is a portable implementation of the C++0x Standard Library's compile-time rational arithmetic working on C++03 and C++0x compilers. Boost.Ratio provides: * A class template, ratio, for specifying compile time rational constants such as 1/3 of a nanosecond or the number of inches per meter. ratio represents a compile time ratio of compile time constants with support for compile time arithmetic with overflow and division by zero protection * A textual representation of boost::ratio<N, D> in the form of a std::basic_string. Other types such as boost::duration will use these strings to aid in their I/O. This library is header-only and is designed to be generic and useful in a lot of areas of C++ programming, in particular it is absolutely needed to Boost.Chrono and Boost.Stopwatches. Boost.Units contain a similar class: static_rational. You can get more complete information from http://svn.boost.org/trac/boost/wiki/LibrariesUnderConstruction#Boost.Ratio Best regards, _____________________ Vicente Juan Botet Escribá http://viboes.blogspot.com/