Class question

[Feral]

I'm studying classes, constructor and deconstructor this week.
I thought I was understanding it properly, so I decided to input the following code to test for a better understanding.

I thought I would see 4 7 2, but the output doesn't cout the default constructor for the second input. It's just 4 2 followed by 2 4.

My question is, is the code wrong, or is my understanding of how the default constructor should work is?

#include <iostream>
using namespace std;

class Package
{
private:
	int value;
public:
	Package()
	{ value = 7; cout << value << endl; }
	Package(int v)
	{ value = v; cout << value << endl; }
	~Package()
	{ cout << value << endl; }
};

int main()
{
	Package obj1(4);
	Package obj2();
	Package obj3(2);
	getchar();
	return 0;
}

[AbstractionAnon]

I get the following warning when I compile your code:

warning C4930: 'Package obj2(void)': prototyped function not called (was a variable definition intended?)

If I change line 20 as follows, I get 4 7 2 as expected:

Package obj2;

[Feral]

I tested that as well and 7 finally shows. I guess it's a typo in the book then.

The book has the () to call the default con. This will help me in the future though.

Thank you.