// pointers04.cpp
#include <iostream>

class Maximum
{
public:
	Maximum() :m_p(0) {}

	// change pointer to specified variable, if the value is larger
	bool Evaluate(int& value)
	{
		if (!m_p || *m_p < value)
		{
			m_p = &value;
			return true;
		}
		return false;
	}

	// retrieve a pointer to the maximum value
	int* GetMaximum()
	{
		return m_p;
	}

private:
	int* m_p;
};

int main()
{
	int a = 1, b = 3, c = 2;

	Maximum m;
	m.Evaluate(a);
	m.Evaluate(b);
	m.Evaluate(c);

	std::cout << "Maximum of a, b and c: " << *m.GetMaximum() << std::endl;
	*m.GetMaximum() -= 3;
	std::cout << "The value of b is " << b;

	return 0;
}