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