功能

利用模板进行数组类封装，在代码实现过程中，使用了
1.operator=重载，利用深拷贝防止浅拷贝问题；
2.operator[]重载，确保可以使用[]来仿真数组元素；
3.尾插法、尾删法、返回数组容量和数组大小；

代码

#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<string>

using namespace std;

template<class T>
class MyArray
{
public:
	/*有参构造*/
	MyArray(int capacity)
	{
		/*cout << "构造" << endl;*/
		this->m_Capacity = capacity;
		this->m_size = 0;
		this->pAddress = new T[this->m_Capacity];
	}

	/*拷贝构造*/
	MyArray(const MyArray &arr)
	{
		/*cout << "拷贝构造" << endl;*/
		this->m_Capacity = arr.m_Capacity;
		this->m_size = arr.m_size;
		/*深拷贝*/
		this->pAddress = new T[arr.m_Capacity];
		/*将arr中的数据拷贝过来*/
		for (int i = 0; i < this->m_size; i++)
		{
			this->pAddress[i] = arr.pAddress[i];
		}
	}

	/*operator= 防止浅拷贝问题*/
	MyArray& operator=(const MyArray& arr)
	{
		/*cout << "operator=调用" << endl;*/
		/*先判断原来堆区是否有数据，如果有先释放*/
		if (this->pAddress != NULL)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
			this->m_Capacity = 0;
			this->m_size = 0;
		}

		/*深拷贝*/
		this->m_Capacity = arr.m_Capacity;
		this->m_size = arr.m_size;
		this->pAddress = new T[arr.m_Capacity];
		for (int i = 0; i < this->m_size; i++)
		{
			this->pAddress[i] = arr.pAddress[i];
		}
		return *this;
	}

	/*尾插法*/
	void Push_Back(const T &val)
	{
		/*判断容量是否等于大小*/
		if (this->m_Capacity == this->m_size)
		{
			cout << "容量等于元素个数" << endl;
			return;
		}

		this->pAddress[this->m_size] = val;/*在数据末尾插入数据*/
		this->m_size++;/*更新数组大小*/
	}

	/*尾删法*/
	void Pop_Back()
	{
		/*让用户访问不到最后一个元素，即为尾删，逻辑删除*/
		if (this->m_size == 0)
		{
			cout << "元素个数为0，不执行尾删！" << endl;
		}
		this->m_size--;
	}

	/*通过下标方式访问数组中的元素*/
	T& operator[](int index)
	{
		return this->pAddress[index];
	}

	/*返回数组容量*/
	int GetCapaCity()
	{
		return this->m_Capacity;
	}

	/*返回数组大小*/
	int GetSize()
	{
		return this->m_size;
	}

	/*析构函数*/
	~MyArray()
	{
		/*cout << "析构" << endl;*/
		if (this->pAddress != NULL)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
	}

private:
	T* pAddress;
	int m_Capacity;
	int m_size;
};

void printMyArray(MyArray<int> &arr)
{
	/*使用了arr.GetSize()*/
	for (int i = 0; i < arr.GetSize(); i++)
	{
		/*使用了[]重载*/
		cout << arr[i] << " ";
	}
	cout << endl;
}

void test01()
{
	MyArray<int>arr1(10);
	
	/*利用尾插法向数组中插入数据*/
	for (int i = 0; i < 5; i++)
	{
		arr1.Push_Back(i);
	}
	
	cout << "arr1中的数据打印：";

	printMyArray(arr1);

	cout << "arr1的容量: " << arr1.GetCapaCity() << endl;
	cout << "arr1的大小: " << arr1.GetSize() << endl;

	/*利用拷贝构造*/
	MyArray<int>arr2(arr1);
	cout << "--------------------" << endl;

	cout << "arr2中的数据打印：";

	printMyArray(arr2);

	cout << "arr2的容量: " << arr2.GetCapaCity() << endl;
	cout << "arr2的大小: " << arr2.GetSize() << endl;

	cout << "arr2尾删后的数据打印 ";

	arr2.Pop_Back();

	printMyArray(arr2);

	return;
}



int main()
{
	test01();

	return 0;
}

运行结果