#include <iostream>
 
class Test {
public:
	int a;
	char* b;
	Test(Test&);
	Test();
};
 
Test::Test(Test& other) : a(other.a)
{
	try {
		if (!other.b) throw std::exception(); 
		b = new char(*other.b);
	}
	catch (...) {
		b = new char('d');
	}
}
 
Test::Test() : a(7), b(new char('c')) {}
 
int main()
{
	Test a;
	Test b(a);
 
	std::cout << (*b.b) << std::endl;
	delete a.b;
	*a.b = NULL;
 
	Test c(a);
	std::cout << (*c.b) << std::endl;
 
	return 0;
}

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