5.29 C++ Style Comments

In GNU C, you may use C++ style comments, which start with `//' and continue until the end of the line. Many other C implementations allow such comments, and they are likely to be in a future C standard. However, C++ style comments are not recognized if you specify `-ansi', a `-std' option specifying a version of ISO C before C99, or `-traditional', since they are incompatible with traditional constructs like dividend//*comment*/divisor.