is this a C++ BUG?

[nrip]

Dear all,
I was just having fun by writing a simple class in C++ today and i found out this

#include<iostream.h>
 
class A
{
 public :
    int a;
}
 
main()
{
  A b;
  b.a = 5;
  cout<<"The value of a is:"<<b.a;
}

this code works absolutely fine even though the class is not closed with a semicolon ";" and if i replace in the above code the main function by VOID MAIN() then it doesn't work!!!!

Is there any defined reason for this thing happening?????

Thanks in advance.

Regards
Nrip

[sicarie]

I would guess that it's your compiler. It's a good thing you're not getting a program working with void main - it should be int main, I'm surprised that just main works.

As for the class, I'm guessing it works either way on your compiler (closed or not), and when you don't have an ending semi-colon, the compiler is closing the class itself when the main instantiates. (These are two separate issues, BTW)

[kreagan]

It's a good thing you're not getting a program working with void main - it should be int main

*Blink Blink* What's wrong with void main?

[sicarie]

*Blink Blink* What's wrong with void main?

I think others can explain it better than I.

The short: ANSI says so. The discussion: http://users.aber.ac.uk/auj/voidmain.shtml

[ashitpro]

this is not a bug.
When you skip the semicolon at the end of class,
compiler interpret that main is returning class A.
But when you specify explicit void,it gives error

[JosAH]

*Blink Blink* What's wrong with void main?

About everything; the exit() function implementation calls main(...) and expects
a return value; an int. I main() happens to be void or whatever, popping the return
value in a stack based machine may corrupt the execution stack.

No matter what Microsoft wants you to believe; they're wrong; the return type
of main() is int, int and just int; not void or whatever. Both the C and C++ Standards
state so in a 'shall' clause which means that it *must* be done so in order to be
compliant with the standard. Everyone who does otherwise hasn't understood
what these Standards are about, e.g. Microsoft.

kind regards,

Jos

[weaknessforcats]

No matter what Microsoft wants you to believe; they're wrong;

If you disable language extensions on your project, this will draw a warning from Visual Studio.NET 2005. Kinda like using g++ with the -pedantic switch.