Error creating object: request for member '..' in '..' which is of non-class type

in the class The one who doesn't get any prints You have defined a constructor that receives one type of int factor.

However, when creating an object in the main function,

The constructor (2) that receives one parameter is fine The generator (1) that does not receive any parameters displays an error! Why?

nonclass.cpp: In function ‘int main(int, const char**)’: nonclass.cpp:17: error: request for member ‘bar’ in ‘foo2’, which is of non-class type ‘Foo ()()’

class Foo
{
  public:
    Foo() {};
    Foo(int a) {};
    void bar() {};
};

int main()
{
  //This is fine
  Foo foo1(1);
  foo1.bar();

  // This isn't okay
  Foo foo2();
  foo2.bar();

  return 0;
}