why no need to return a value in GNU C/C++ ??

[suryak]

I'm using gcc 4.4.1 C/C++ compiler for programming in Ubuntu.
The thing I noticed is,
The program works with no errors even though I don't type the function to be as ' void main ' or ' return 0 ' ( or return any value) at the end of the program..
It absloutely works !!

But not in Turbo C/C++ IDE ( which we use in Windows ), a DOS compiler !!

Why ???

[kermit]

Try using the -Wall and -Wextra switches when you compile, and see what happens then. BTW, void main is never valid, at any time - main returns an int.

[adeyblue]

I'm using gcc 4.4.1 C/C++ compiler for programming in Ubuntu.
The thing I noticed is,
The program works with no errors even though I don't type the function to be as ' void main '

Because leaving out 'void main' is the only good thing you can do with it.

or ' return 0 ' ( or return any value) at the end of the program..

Because C++ doesn't require return at the end of main

But not in Turbo C/C++ IDE ( which we use in Windows ), a DOS compiler !!

Why ???

Because Turbo C++ was made before there was an agreement as to what constituted C++, also it's rubbish.