Is this a bug or I misunderstand?

["Maggie Mitchell" <maggie_shh at hotmail dot com>]

//The codes begin
#include <stdio.h>
class A {
public:
   A(int i=0)
       {
       printf("hello\n");
       }
};
int main()
{
printf("begin\n");
A a;
printf("----\n");
A b();
printf("end\n");
return 0;
}
//codes end
I think the result should be
begin
hello
------
hello
end

but the result  is
are
begin
hello
-----
end

why?Is It a bug of g++ or I misunderstand the behaviour of constructor?

Regards
  Maggie


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