I always program in C# so the last time I installed VS I remember picking C# Mode or something like that. But now, I’m learning C and when I go to new project, C and C++ aren’t there at all. What can I do to get these languages back without resetting all of my settings?

Since this was settled in the comments but nobody posted an answer… You just use the
C++compiler and set the option to compile asCcode as shown in this figure by Mahesh.