Will not compute

Oh internet I love you

I found this on stack exchange. Someone couldn't figure out why their program wouldn't compile. Can you?
http://stackoverflow.com/questions/5508110/why-is-this-program-erroneously-rejected-by-three-c-compilers

I didn't know stack exchange had comedians.

What made it even better was this comment below

___________________________________________________________________________________

In the standard, §2.1/1 specifies: Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set (introducing new-line characters for end-of-line indicators) if necessary. Your compiler doesn't support that format (aka cannot map it to the basic source character set), so it cannot move into further processing stages, hence the error. It is entirely possible that your compiler support a mapping from image to basic source character set, but is not required to. Since this mapping is implementation-defined, you'll need to look at your implementations documentation to see the file formats it supports. Typically, every major compiler vendor supports (canonically defined) text files: any file produced by a text editor, typically an accepted series of characters. Note that the C++ standard is based off the C standard (§1.1/2), and the C(99) standard says, in §1.2: This International Standard does not specify — the mechanism by which C programs are transformed for use by a data-processing system; — the mechanism by which C programs are invoked for use by a data-processing system; — the mechanism by which input data are transformed for use by a C program; So, again, the treatment of source files is something you need to find in your compilers documentation.