1 1 6.39 C++ Style Comments 1 ======================= 1 1 In GNU C, you may use C++ style comments, which start with '//' and 1 continue until the end of the line. Many other C implementations allow 1 such comments, and they are included in the 1999 C standard. However, 1 C++ style comments are not recognized if you specify an '-std' option 1 specifying a version of ISO C before C99, or '-ansi' (equivalent to 1 '-std=c90'). 1