An expression can be explicitly converted or cast to type T using dynamic_cast<T>, static_cast<T>, reinterpret_cast<T>, or const_cast<T>, depending on what type of cast is intended.
C++ also supports function-style cast notation, T(expr), and C-style cast notation, (T)expr.
A list of type conversion in talend with some examples.
Excel gives functions that will assist in converting from decimal to one of binary, octal and hexadecimal, and back again.