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→Linux Gnu C++
Borland C++ Compiler 5.5 is a free version. You can download it from [https://acs.senecac.on.ca/pages/download.php ACS].
===Linux Gnu C++===
Many distro come with compiler pre-installed. If not, you can use the package manager tool (yum, apt-get, merger...) in your system to search for GCC, and install that package. Also, there are some useful tools that you may need, such as autoconf, make, ctag and etc.
===Mac OS C++===
to be completed