> Some very basic C code working with one compiler might not work on another. I teach C and C++, and you have no idea how often I hear "But it worked on my mac

> Some very basic C code working with one compiler might not work on another. I teach C and C++, and you have no idea how often I hear "But it worked on my machine!" when I give back bad grades due to code that segfaults when I go to run it.