AFAIK Debian isn&#x27;t very diligent about tagging packages with &quot;implemented-in&quot;, but even so:<p><pre><code>  dpkg -l |grep ^ii -c #Installed packages
  3608
  # packages tagged as being in c++, and installed:
  aptitude search &#x27;?tag(implemented-in::c++)&#x27; \
    |grep ^i -c
  930
</code></pre>
I&#x27;m sure there&#x27;s lots of c++ in the other 75% (or they depend on a runtime&#x2F;compiler&#x2F;library written in c++) -- but at any rate - one in four packages is nothing to sneeze at.