Why some of the compiler showing error when we write void main() in c++?

Answer 1

Ah, I was about to post the link but @Jay did it. Yes, void return type for main() has never been a part of the standard, and will never be.

Answer 2

@manual: it is not even valid c according to the standard

Answer 3

it is not considered valid c++.

here is what the creator of c++ has to say on the matter:
http://www.stroustrup.com/bs_faq2.html#void-main

Answer 4

just use int main

void main is for C code with no return value.

Answer 5

@Jay

It makes sense,

void main did not seem very useful to me, in C code.