C++类模板实例：数组类封装

实现功能：

对于用户提供的数据类型能够实现①整个数组赋值（拷贝）②插入与删除 ③获得数组的大小和容量

头文件 “MyArray.hpp" ：

#pragma once
#include<iostream>
using namespace std;
template <class T>
class MyArray
{
public:
	MyArray(int capacity)
	{
		this->m_Capacity = capacity;
		this->m_Size = 0;
		this->pAddress = new T[capacity];
	}
	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 < this->m_Size; i++)
		{
			this->pAddress[i] = arr.pAddress[i];
		}
	}
	~MyArray()
	{
		if (this->pAddress)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
	}
	MyArray& operator=(const MyArray& arr)
	{
		if (this->pAddress)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
		this->m_Capacity = arr.m_Capacity;
		this->m_Size = arr.m_Size;
		this->pAddress = new T[this->m_Capacity];
		for (int i = 0; i < this->m_Size; i++)
		{
			this->pAddress[i] = arr.pAddress[i];
		}
	}
	void Push_Back(const T& val)
	{
		if (this->m_Capacity == this->m_Size)
		{
			cout << "The Array is full" << endl;
			return;
		}
		this->pAddress[this->m_Size] = val;
		this->m_Size++;
	}
	void Pop_Back()
	{
		if (this->m_Size)this->m_Size--;
		else return;
	}
	T& operator[](int index)
	{
		return this->pAddress[index];
	}
	int getCapacity()
	{
		return this->m_Capacity;
	}
	int getSize()
	{
		return this->m_Size;
	}
private:
	T* pAddress;
	int m_Capacity;
	int m_Size;
};

 主函数测试：

#include<iostream>
#include <string>
using namespace std;
#include"MyArray.hpp"

class Person
{
public:
	Person(){}
	Person(string name, int age)
	{
		m_Name = name;
		m_Age = age;
	}
	string m_Name;
	int m_Age;
};
void Print( MyArray<Person>& arr)
{
	for (int i = 0; i < arr.getSize(); i++)
	{
		cout << arr[i].m_Name << " " << arr[i].m_Age << endl;
	}
}
void test()
{
	MyArray<Person> arr(10);
	Person p1("Vi", 19);
	Person p2("jinx", 16);
	Person p3("Caitlyn", 19);
	Person p4("Worick", 45);
	Person p5("Victor", 25);
	arr.Push_Back(p1);
	arr.Push_Back(p2);
	arr.Push_Back(p3);
	arr.Push_Back(p4);
	arr.Push_Back(p5);
	Print(arr);
	cout << "Capacity: " << arr.getCapacity() << endl;
	cout << "Size: " << arr.getSize() << endl;
}
int main()
{
	test();
	system("pause");
	return 0;
}