c++之类模板案例

#include<iostream>
using namespace std;

template<class T>
class MyArray {
public:
    //有参构造
    MyArray(int capacity) {
        cout << "有参构造函数调用" << endl;
        this->m_Capacity = capacity;
        this->m_Size = 0;
        this->pAddress = new T[this->m_Capacity];
    } 
    析构函数
    ~MyArray() {
        cout << 析构函数调用if (this->pAddress != NULL) {
            delete[] pAddress;
            this->pAddress = NULL;
        }
    }
    拷贝构造
    MyArray(const MyArray& arr) {
        cout << 拷贝构造函数调用 arr.m_Capacity;
        this->m_Size = arr.m_Size;
        this->pAddress = arr.pAddress;
        深拷贝
        new T[arr.m_Capacity];
        还要将原有数据拷贝过来
        for (int i = 0; i < this->m_Size; i++) {
            this->pAddress[i] = arr.pAddress[i];
        }
    }
    operator=也是为了防止浅拷贝问题
    MyArray& operator=(重载=调用先判断原来的堆区是否有数据，如果有先释放
         NULL;
            ;
            this->m_Capacity = ;
        }
         arr.pAddress[i];
        }
        return *this;
    }
    尾插法插入数据
    void Push_Back(const T& val) {
        this->m_Capacity == m_Size) {
            returnthis->pAddress[this->m_Size] = val;
        this->m_Size++尾删法
    void Pop_back() {
        this->m_Size == this->m_Size--通过数组下标访问数据
    T& operator[]( index) {
        return pAddress[index];
    }
    返回数组的容量
     getCapacity() {
        m_Capacity;
    }
    返回数组的大小
     getSize() {
        m_Size;
    }
private:
    T* pAddress;指针指向堆区开辟的真实数组
    int m_Capacity;容量
    int m_Size;数组大小

};

#include myArray.hpp"

void printArr(MyArray <int>& arr) {
    0; i < arr.getSize(); i++) {
        cout << arr[i] << " ";
    }
    cout << endl;
}

 test() {
    MyArray <int>arr1(5);
    MyArray <int>arr2(arr1);
    MyArray <int>arr3(10);
    arr3 = arr1;
    插入数据
    arr1.Push_Back(1);
    arr1.Push_Back(2);
    cout << 插入之后的数组： endl;
    printArr(arr1);
    cout << 删除最后一个元素的数组： endl;
    arr1.Pop_back();
    printArr(arr1);
    cout << 此时数组的大小：" << arr1.getSize()<<endl;
    cout << 此时数组的容量：" << arr1.getCapacity() << endl;

}

 main() {
    test();
    system(pausereturn ;
}