How can I know which version of the C++ "standard library" is installed?

I would like to install the C++ standard library documentation (following the answers in Download C++ reference) but I do not know which version of library is installed in my Ubuntu.

2 Answers

Simple way to find the version of C++ standard library is

gcc --version

Hope this helps

Fire up synaptic and search for libstdc++ and see which version is installed, or run apt-cache search -n libstdc++ to see what versions are known, then you can check which one(s) are installed with apt-cache policy libstdc++-XXXX