Hmm, don’t think so. The function does not operate on a string, it seems to read a character using read() and write it back, transformed, using write(). Given t

Hmm, don’t think so. The function does not operate on a string, it seems to read a character using read() and write it back, transformed, using write(). Given that the function is named main, it’s probably the top level function anyway (from the programmer’s point of view, often the OS actually calls into a different function that is part of the language runtime, e.g. _start, which in turn calls main eventually, but that is usually hidden from the programmer).