Same here, @Finalspace. You forgot when the search engines return C# or Objective-C hahaha. This is one of the problems with algorithms that measure popularity of languages.

What's stopping a search engine from looking at the sequence of characters "C++" and deciding to index the page under "C"?

Actually, it's the contrary situation: you want to find "C" posts, but the engine returns "C++" posts. "C++" search will often return "C++" correct results, but "C" search will often return a bunch of other languages that are not C.

For Google-based searchs, and probably others, this works for me in queries:

"C " -"C++" -"C#"

Note the space inside "C " which many engines will see as a complete word, not a word stem matching C++ or C#. Some search engines use "not" instead of the - sign, and specifically excluding the other two languages can help as well.

Am I the only one understanding it the way that he's not complaining about search engines mistaking "C++" for "C", but actually people using "C" as a tag when they are actually talking about c++?

Am I the only one understanding it the way that he's not complaining about search engines mistaking "C++" for "C", but actually people using "C" as a tag when they are actually talking about c++?

well, yeah :D we are extrapolating our anger :'D

Maybe, but I took it to mean search engines from the first line:

Always when i search for C i get tons of posts on forums, videos, blogs where

In in search engines, forums, blogs, and other sites, or other places that allow searches, that's where the option to exclude C++ and exclude C# comes in. While an article tag may be plain C, the innards of the posts tend to have C# or C++ or similar that disqualifies it from the search.

Exclude them and they'll be less likely to appear.