Cling, from CERN, provides a REPL: http://root.cern.ch/drupal/content/cling http://root.cern.ch/drupal/content/cling There are also clang-based auto-complete a

Cling, from CERN, provides a REPL: http://root.cern.ch/drupal/content/cling http://root.cern.ch/drupal/content/cling There are also clang-based auto-complete and syntax-checking plugins for sublime, emacs, and presumably others. Another emacs package I've been meaning to try is "disaster", which shows you the assembly that the code under your cursor compiles to: https://github.com/jart/disaster https://github.com/jart/disaster What c++ is sorely lacking, in my opinion, is a (library) package management system.