Good point. "void" does not appear in K&R1 (1978), and there was no definitive manual for the language between that and the ANSI standard, but it did start appe

Good point. "void" does not appear in K&R1 (1978), and there was no definitive manual for the language between that and the ANSI standard, but it did start appearing in implementations. Still, I'm not aware of any implementation that explicitly supported void as the return type of main. (Many compilers would accept just about any return type without complaint.) Somehow some authors got the idea that "void main()" was a good idea. I find it to be a good way to detect authors who don't know the language very well.