C++中类模板的应用

1，T *pAddress 指向堆区数组的指针。
2，int m_Capacity 数组容量
3，int m_Size 数组大小

1,myArray(int capacity) 构造函数
2,myArray(const MyArray&arr) 拷贝构造函数
3,operator= 重载赋值操作符=
4,operator[] 重载中括号[]
5,~myArray()  析构函数
6,getCapacity 获取容量
7,getSize     获取大小
8,pushback   尾插

#pragma once
#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;
#include<string>
template<class T>
class MyArray
{
public:
	MyArray() {};//默认构造
	MyArray(int capacity)//有参构造
	{
		this->m_Capacity = capacity;
		this->m_Size = 0;
		this->pAddress = new T[this->m_Capacity];
	}
	MyArray(const MyArray& arr)//拷贝构造
	{
		this->m_Capacity = arr.m_Capacity;
		this->m_Size = arr.m_Size;
		this->pAddress = new T[this->m_Capacity];//这个不能直接拷贝，需要自己重新创建
		for (int i = 0; i < arr.m_Size; i++)//然后将数组的元素一个个的赋值过来
		{
			this->pAddress[i] = arr.pAddress[i];
		}
	}
	MyArray& operator=(const MyArray &arr)//重载赋值操作符=（返回自身的引用）
	{
		if (this->pAddress)//如果原先有数据了，那么就删除
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
		//然后进行深拷贝
		this->m_Capacity = arr.m_Capacity;
		this->m_Size = arr.m_Size;
		this->pAddress = new T[this->m_Capacity];//这个不能直接拷贝，需要自己重新创建
		for (int i = 0; i < arr.m_Size; i++)//然后将数组的元素一个个的赋值过来
		{
			this->pAddress[i] = arr.pAddress[i];
		}
		return *this;
	}
	T& operator[](int dex)//重载[] 为了访问数组中的值，
	{
		return this->pAddress[dex];
	}

	void pushBack(const T& val)//尾插
	{
		if (this->m_Capacity <= this->m_Size)//如果已经超过范围了
		{
			return;
		}
		this->pAddress[this->m_Size] = val;
		this->m_Size++;
	}
	int getCapacity()//获取数组容量
	{
		return this->m_Capacity;
	}
	int getSize()//获取数组大小
	{
		return this->m_Size;
	}
	~MyArray()//析构
	{
		if (this->pAddress)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
	}
private:	 
	T* pAddress;//指向堆区真实数组指针
	int m_Capacity;//数组容量
	int m_Size;
};

#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;
#include<string>
#include"myArray.hpp"
void myPrint(MyArray<int> &myIntArray)
{
	for (int i = 0; i < myIntArray.getSize(); i++)
	{
		cout << myIntArray[i] << endl;
	}
}
int main()
{
	MyArray<int> myIntArray(100);
	for (int i = 0; i < 10; i++)
	{
		myIntArray.pushBack(i + 100);
	}
	myPrint(myIntArray);
	return 0;
}

#pragma once
#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;
#include<string>

template<class T>
class MyArray
{
public:
	MyArray() {};//默认构造
	MyArray(int capacity)//有参构造
	{
		this->m_Capacity = capacity;
		this->m_Size = 0;
		this->pAddress = new T[this->m_Capacity];
	}
	MyArray(const MyArray& arr)//拷贝构造
	{
		this->m_Capacity = arr.m_Capacity;
		this->m_Size = arr.m_Size;
		this->pAddress = new T[this->m_Capacity];//这个不能直接拷贝，需要自己重新创建
		for (int i = 0; i < arr.m_Size; i++)//然后将数组的元素一个个的赋值过来
		{
			this->pAddress[i] = arr.pAddress[i];
		}
	}
	MyArray& operator=(const MyArray &arr)//重载赋值操作（返回自身的引用）
	{
		if (this->pAddress)//如果原先有数据了，那么就删除
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
		//然后进行深拷贝
		this->m_Capacity = arr.m_Capacity;
		this->m_Size = arr.m_Size;
		this->pAddress = new T[this->m_Capacity];//这个不能直接拷贝，需要自己重新创建
		for (int i = 0; i < arr.m_Size; i++)//然后将数组的元素一个个的赋值过来
		{
			this->pAddress[i] = arr.pAddress[i];
		}
		return *this;
	}
	T& operator[](int dex)//重载[] 为了访问数组中的值，
	{
		return this->pAddress[dex];
	}

	void pushBack(const T& val)//尾插
	{
		if (this->m_Capacity <= this->m_Size)//如果已经超过范围了
		{
			return;
		}
		this->pAddress[this->m_Size] = val;
		this->m_Size++;
	}
	int getCapacity()//获取数组容量
	{
		return this->m_Capacity;
	}
	int getSize()//获取数组大小
	{
		return this->m_Size;
	}
	~MyArray()//析构
	{
		if (this->pAddress)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
	}
private:	 
	T* pAddress;//指向堆区真实数组指针
	int m_Capacity;//数组容量
	int m_Size;
};

#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;
#include<string>
#include"myArray.hpp"
class Person
{
public:
	Person() {};
	string m_name;
	int m_age;
	Person(string name, int age)
	{
		this->m_age = age;
		this->m_name = name;
	}
};
void myPrintInt(MyArray<int> &myIntArray)//int的
{
	for (int i = 0; i < myIntArray.getSize(); i++)
	{
		cout << myIntArray[i] << endl;
	}
}
void myPrintPerson(MyArray<Person>& myPersonArray)//Person的
{
	for (int i = 0; i < myPersonArray.getSize(); i++)
	{
		cout << myPersonArray[i].m_name << " " << myPersonArray[i].m_age << endl;
	}
}
int main()
{
	/*MyArray<int> myIntArray(100);
	for (int i = 0; i < 10; i++)
	{
		myIntArray.pushBack(i + 100);
	}
	myPrintInt(myIntArray);*/
	MyArray<Person>myPersonArray(100);
	Person p1("小明", 18);
	Person p2("小宏", 18);
	Person p3("小量", 19);
	Person p4("小应", 18);
	myPersonArray.pushBack(p1);
	myPersonArray.pushBack(p2);
	myPersonArray.pushBack(p3);
	myPersonArray.pushBack(p4);
	myPrintPerson(myPersonArray);
	cout << "数组容量:"<<myPersonArray.getCapacity()<< endl;//100
	cout << "数组大小:" << myPersonArray.getSize() << endl;//4
	return 0;
}