http://ideology.com.au/polyglot/ is a nice eight-language (Cobol, Pascal, Fortran, C, PostScript, Shell, x86, Perl) polyglot program.
Conveniently, it has a source viewer which will highlight relevant parts of the program's structure for a given language. For instance, the C compiler sees this: http://ideology.com.au/polyglot/c/
Conveniently, it has a source viewer which will highlight relevant parts of the program's structure for a given language. For instance, the C compiler sees this: http://ideology.com.au/polyglot/c/