模板自定义数组

幽沉谢世事，俯默窥唐虞。这篇文章主要讲述模板自定义数组相关的知识，希望能为你提供帮助。
制造通用模板，创建自定义的数组
【模板自定义数组】自定义数组.hpp--文件

#pragma once
#include< iostream>
using namespace std;
#include< string>
template< class T>
class Myarry

public:
Myarry() ; //自己创建有参构造，编译器就不提供无参构造，所以必须自己写一次无参构造，即使是空实现也要写！
Myarry(int capacity)//有参构造函数

this-> capacity = capacity;
this-> size = 0;
this-> marry = new T[this-> capacity]; //把数组创建在堆区

~Myarry()//析构函数

if (this-> marry !=NULL)

delete []this-> marry; //析构数组必须加[]，否则会引发断点
marry = NULL;
this-> capacity = 0;
this-> size = 0;

Myarry(const Myarry& arr)//拷贝构造

this-> capacity = arr.capacity;
this-> size = arr.size;
this-> marry = new T[arr.capacity];
for (int i = 0; i < arr.size; i++)//把数据拷贝过来

this-> marry[i] = arr-> marry[i];

//等号赋值
Myarry& operator=(const Myarry& arr)

if (this-> marry != NULL)//如果有数据先清空，再赋值

delete[]this-> marry;
this-> marry= NULL;
this-> size = 0;
this-> capacity = 0;

this-> capacity = arr.capacity;
this-> size = arr.size;
this-> marry = new T[this-> capacity];
for (int i = 0; i < this-> size; i++)//将数据进行拷贝

this-> marry[i] = arr.marry[i];

return *this;

void pushback(const T& ptr)//尾加法

if (this-> capacity == this-> size)

cout < < "容量已满！" < < endl;
return;

this-> marry[this-> size] = ptr;
this-> size++;

void deleteback()//尾删法

if (this-> size == 0)

cout < < "数据为零，没有可删数据！" < < endl;

delete this-> marry[this-> size - 1];
this-> size--;

T & operator[](int index)//通过下标访问数组,并使它作为左值加&

if (index > this-> capacity)

cout < < "访问越界！" < < endl;
exit(0);

return this-> marry[index];

int gercapacity()//获取数组容量

return this-> capacity;

int getsize()//获取数组元素个数

return this-> size;

private:
T * marry; //数组
int capacity; //数组容量
int size; //数组元素个数
;

测试文件

#include "自定义数组.hpp"
class person

public:
person()

this-> age = 0;

int age;
string name;
;
void text01()

person p[4];
p[0].age = 20;
p[0].name = "张三";
p[1].age = 0;
p[1].name = "李四";
p[2].age = 40;
p[2].name = "王五";
p[3].age = 80;
p[3].name = "赵六";
Myarry< person> pp(10);
for (int i = 0; i < 4; i++)

pp.pushback(p[i]);

for (int i = 0; i < pp.getsize(); i++)

cout < < pp[i].name< < pp[i].age< < endl;

void text02()

Myarry< int> inta(10);
for (int i = 0; i < 5; i++)

inta.pushback(i);

for (int i = 0; i < inta.getsize(); i++)

cout < < inta[i] < < endl;

int main()

/*text02(); */
text01();
return 0;