博客

class MyIterator
{
public:
	MyIterator(int* vector)
	{
		m_vector = vector;
	}
	int& operator *()
	{
		return *m_vector;
	}

	bool operator!=(const MyIterator it)
	{
		return m_vector != it.m_vector;
	}

	MyIterator& operator++()
	{
		m_vector++;
		return *this;
	}

	MyIterator operator++(int)
	{
		MyIterator tmp = *this;
		++(*this);
		return tmp;
	}

private:
	int* m_vector;
};

class MyVector
{
public:
	typedef MyIterator iterator;
	MyVector(int n)
	{
		m_count = n;
		m_vector = new int[n];
		for (int i = 0; i < n; ++i)
		{
			m_vector[i] = i;
		}
	}

	iterator begin()
	{
		return iterator(m_vector);
	}

	iterator end()
	{
		return iterator(m_vector + m_count);
	}

private:
	int* m_vector;
	int m_count;
};

int main()
{
	MyVector mv(5);
	//MyVector::iterator it = mv.begin();
	//while (it != mv.end())
	//{
	//	cout << *(it++) << endl;
	//}
	const auto& begin = mv.begin();
	const auto& end = mv.end();
	std::for_each(begin, end, [](const auto e)
	{
		std::cout << e << endl;
	});

	return 0;
}

参考网址：https://blog.csdn.net/XiaoHeiBlack/article/details/77014626