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The main method is often misunderstood.

In C89, main() on its own is acceptable, but C99 only allows for either (The second one is for command line paramaters):

Quote:

int main ( void )
int main ( int argc, char *argv[] )

In C89, main() MUST return something but C99 says if a return statement is absent, then 0 is implied (sucess). I do however think this has been removed in newer standards. This is as when C was new, void did not exist and the machines of the time required that the program return an integer value for sucess or not. Anything other that 0 (sucess) was logged.

In C++ there is allowed

Quote:

int main ( int argc, char *argv[] )
int main ()

Note that int main() is NOT void. The empty brackets do NOT indicate no paramaters, they in fact indicate an unlimited number of paramaters.

The ISO C Standard (ISO/IEC 9899:1999) says it is also illegal for C++ to have a return type of void. The return type should be an integer and the function should return 0 or EXIT_SUCCESS; at the end. A return type of void does NOT mean it returns nothing, it just means it returns a junk value which will pribably not be 0.

I do hope thats right, that just my understanding from my notes.