Thread: Destructor Problem

Hi, I compile the following program using Microsoft Visual C++ 6.0:

Create.h

Code:

#ifndef CREATE_H
#define CREATE_H

class CreateAndDestroy
{
public:
	CreateAndDestroy(int, char *);
	~CreateAndDestroy();

private:
	int object_id;
	char *message;
};

#endif

Create.cpp

Code:

#include <iostream>
#include "Create.h"

using namespace std;

CreateAndDestroy::CreateAndDestroy(int object_number, char *messageptr)
{
	object_id = object_number;
	message = messageptr;

	cout << "Object " << object_id << " constructor runs " << message << endl;
}

CreateAndDestroy::~CreateAndDestroy()
{
	if (object_id == 1 || object_id == 6)
	{
		cout << "\n";
	}
	else
	{
		cout << "";
	}

	cout << "Object " << object_id << " destructor runs " << message << endl;
}

TestCreate.cpp

Code:

#include <iostream>
#include "Create.h"

using namespace std;

void create()
{
	cout << endl << "CREATE FUNCTION: EXECUTION BEGINS" << endl;
	CreateAndDestroy fifth(5, "(local automatic in create)");
	static CreateAndDestroy sixth(6, "(local static in create)");
	CreateAndDestroy seventh(7, "(local automatic in create)");
	cout << endl << "CREATE FUNCTION: EXECUTION ENDS" << endl;
}

CreateAndDestroy first(1, "(global before main)");

int main()
{
	cout << endl << "MAIN FUNCTION: EXECUTION BEGINS" << endl;
	CreateAndDestroy second(2, "(local automatic in main)");
	static CreateAndDestroy third(3, "(local static in main)");
	create();
	cout << endl << "MAIN FUNCTION: EXECUTION RESUMES" << endl;
	CreateAndDestroy fourth(4, "(local automatic in main)");
	cout << endl << "MAIN FUNCTION: EXECUTION ENDS" << endl;
	return 0;
}

While the program is working, the result is not the one that I expect. Somehow, the destructor of object 1 is not getting called. I have debugged the program several time, but I cannot find the answer why destructor of object 1 is not getting called. Here is the result of the program:

Object 1 constructor runs (global before main)

MAIN FUNCTION: EXECUTION BEGINS
Object 2 constructor runs (local automatic in main)
Object 3 constructor runs (local static in main)

CREATE FUNCTION: EXECUTION BEGINS
Object 5 constructor runs (local automatic in create)
Object 6 constructor runs (local static in create)
Object 7 constructor runs (local automatic in create)

CREATE FUNCTION: EXECUTION ENDS
Object 7 destructor runs (local automatic in create)
Object 5 destructor runs (local automatic in create)

MAIN FUNCTION: EXECUTION RESUMES
Object 4 constructor runs (local automatic in main)

MAIN FUNCTION: EXECUTION ENDS
Object 4 destructor runs (local automatic in main)
Object 2 destructor runs (local automatic in main)

Object 6 destructor runs (local static in create)
Object 3 destructor runs (local static in main)
Press any key to continue

Can you help me find the answer? Thank you for your help in advance.

I think this is a problem with your c library. That destructor will run after main has returned that's why you don't see the output statement.
I think MS library behaves this way.
Try setting a breakpoint in the destructor. It should be executed.
Kurt