Is void main correct?

No. It’s non-standard. The standard prototype of main is int main() with the optional command line arguments argc and argv . The int returned by main() is a way for a program to return a value to the system that invokes it.

Why there is always into main function in the program why not void main function?

The short answer, is because the C++ standard requires main() to return int . As you probably know, the return value from the main() function is used by the runtime library as the exit code for the process. Both Unix and Win32 support the concept of a (small) integer returned from a process after it has finished.

Why void main is not used in Dev C++?

Even if your compiler accepts “void main()” avoid it, or risk being considered ignorant by C and C++ programmers. In C++, main() need not contain an explicit return statement. In that case, the value returned is 0, meaning successful execution.

Can we write void main in C++?

The definition void main() is not and never has been C++, nor has it even been C. See reference. You should use int main . Both the C and C++ standards specify that main should return a value.

Why do we use return 0 in C?

It is used to return a value from the function or stop the execution of the function….C++

Use-case	return 0	return 1
In the main function	return 0 in the main function means that the program executed successfully.	return 1 in the main function means that the program does not execute successfully and there is some error.

Why do we use int main() instead of void main()?

Since, as said, main function could be called by a startup code that pass in no arguments at all, and that expect no a return value in a specific register (so that void main (void) is correct). The int main () is correct since normally start up code expect a return value, and pass in two arguments.

Is voidvoid main() wrong in C++?

void main () is not actually wrong and many compilers will not throw any error and also you can run your code successfully in some systems. But it is not recommended.

Is it OK to use void main in a test?

On other evironments (I can’t do practical tests now), void main (void) is ok, while in this case it raises a warning. The warning is not because of standard alone, but only since in the environment in use the prototype for main does not match. Standard seems to allow any other “configuration” for main.

What is the return type of a void main function?

Void main means the function not returning anything and (void means empty ) For void main there no return type . Compliation time 0.56 and return 0. ( U can see return 0 after execution in complier (black screen) .