60 C++ - 类模板的应用

设计一个数组模板类(MyArray),完成对不同类型元素的管理

#pragma once
template
class MyArray
{
public:
	explicit MyArray(int capacity)
	{
		this->m_Capacity = capacity;
		this->m_Size = 0;
		// 如果T是对象，那么这个对象必须提供默认的构造函数
		pAddress = new T[this->m_Capacity];
	}

	//拷贝构造
	MyArray(const MyArray & arr)
	{
		this->m_Capacity = arr.m_Capacity;
		this->m_Size = arr.m_Size;
		this->pAddress = new T[this->m_Capacity];
		for (int i = 0; i m_Size;i++)
		{
			this->pAddress[i] = arr.pAddress[i];
		}
	}

	//重载[] 操作符  arr[0]
	T& operator [](int index)
	{
		return this->pAddress[index]; 
	}
	//尾插法
	void Push_back(const T & val)
	{
		if (this->m_Capacity == this->m_Size)
		{
			return;
		}
		this->pAddress[this->m_Size] = val;
		this->m_Size++;
	}
	void Pop_back()
	{
		if (this->m_Size == 0)
		{
			return;
		}
		this->m_Size--;
	}
	int	getSize()
	{
		return this->m_Size;
	}
	//析构
	~MyArray()
	{
		if (this->pAddress != NULL)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
			this->m_Capacity = 0; 
			this->m_Size = 0;
		}
	}

private:
	T * pAddress;  //指向一个堆空间，这个空间存储真正的数据
	int m_Capacity; //容量
	int m_Size;   // 大小
};

测试代码：


class Person{
public:
	Person(){}
	Person(string name, int age){
		this->mName = name;
		this->mAge = age;
	}
public:
	string mName;
	int mAge;
};


void PrintMyArrayInt(MyArray& arr){
	for (int i = 0; i