类模板案例-数组类封装

#pragma once
#include
using namespace std;

template
class MyArray {
public:
	MyArray(int Capacity) {
		this->Capacity = Capacity;
		this->Size = 0;
		this->pAddress = new T[this->Capacity];

	}

	//尾插法
	void PushBack(const T& val) {
		//判断容量是否等于大小
		if (this->Capacity == this->Size)
			return;
		this->pAddress[this->Size] = val;
		this->Size++;
	}

	//尾删法
	void PopBack() {
		//让用户访问不到最后一个元素即可。逻辑删除
		if (this->Size == 0)
			return;
		this->Size--;
	}

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

	//返回数组的容量
	int getCapacity() {
		return this->Capacity;
	}

	//返回数组的数据元素个数
	int getSize() {
		return this->Size;
	}

	~MyArray() {
		if (this->pAddress != NULL) {
			delete[] this->pAddress;
			this->pAddress = NULL;
			this->Capacity = 0;
			this->Size = 0;
		}
	}

	MyArray(const MyArray& arr) {
		this->Capacity = arr.Capacity;
		this->Size = arr.Size;
		this->pAddress = new T[arr.Capacity];
		for(int i=0;iSize;i++)
			this->pAddress[i] = arr.pAddress[i];
	}

	MyArray& operator=(const MyArray& arr) {
		//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->Capacity = 0;
			this->Size = 0;
		}
		this->Capacity = arr.Capacity;
		this->Size = arr.Size;
		this->pAddress = new T[arr->Capacity];
		for (int i = 0; i < this->Size; i++)
			this->pAddress[i] = arr.pAddress[i];

		return *this;
	}
private:
	T* pAddress;		//指针指向堆区开辟的真实数组

	int Capacity;       //数组容量

	int Size;			//数组元素个数
};