Myarr的实现

#include<iostream>
#include <string>
using namespace std;
template <class T>//使用模板函数
class myarr
{
public:
  myarr(int n)//有参构造
  {
    this->C = n;
    this->size = 0;
    this->p = new T[C];
  }
  myarr(const myarr& other)//复制构造
  {
    this->C = other.C;
    this->size = other.size;
    this->p = new T[other.C];//防止重复释放空间
    for (int i = 0; i < size; i++)
      p[i] = other[i];
  }
  ~myarr()
  {
    if (this->p != NULL)//判断P是否为空，然后delete
    {
      delete[]this->p;
      this->p = NULL;//防止p变成野指针
    }
  }
  void push_back(const T& num)//将数据存入myarr中
  {
    if (this->C == this->size)//如果超过容量就return
      return;
    this->p[this->size] = num;
    this->size++;
  }
  void pop_back()//尾删法，使size减一
  {
    if (this->size == 0)
      return;
    this->size--;
  }
  myarr& operator=(const myarr& other)//重载等号，要深复制，方式p重复释放空间
  {
    if (this->p != NULL)
    {
      delete[]this->p;
    }
    this->C = other.C;
    this->size = other.size;
    this->p = new T[other.C];
    for (int i = 0; i < size; i++)
      p[i] = other[i];
    return *this;
  }
  T& operator[](int index)//重载[]
  {
    return this->p[index];
  }
  int getC()//获取容量
  {
    return this->C;
  }
  int getsize()//获取数组大小
  {
    return this->size;
  }
private:
  T* p;
  int size;
  int C;
};
class base//用base类进行测试myarr
{
public:
  base() :name("null"), age(0) {
  }
  base(string n, int a)
  {
    this->age = a;
    this->name = n;
  }
  void show()const
  {
    cout << "名字： " << name << " 年龄： " << age;
  }
  ~base() {}
private:
  string name;
  int age;
};
void myprintf(  myarr<base>&m)//用于打印base类的数组
{
  for (int i = 0; i < m.getsize(); i++)
  {
    m[i].show();
    cout << endl;
  }
  cout <<"myarr的容量"<< m.getC() << endl;
  cout <<"myarr的大小"<< m.getsize() << endl;
}
void test()//测试案例
{
  base b1("zhangshan", 100);
  myarr<base>a(5);
  for(int i=0;i<5;i++)
  a.push_back(b1);
  myprintf(a);
cout<<endl;
  a.pop_back();
  myprintf(a);
}
int main()
{
  test();
  return 0;
}