I am trying to see the manual entry for c++ keywords like std::vector,std::set,std::map, iostream,std::size() e.t.c in terminal but it says, No manual entry for these commands. Even is show the same thing when i typed man iostream. g++ is installed in my computer.
There is no man support for C++ language and its feature on Linux based machine. If you really want to work with the standard documentation online, you may refer cppreference
However you may also download cppreference the complete documentation in various format and work offline. I recommend that you should follow this and download complete documentation archive from below location: