技術標籤：# 陣列C++c++

實現一個通用的陣列類，要求如下：

• 可以對內建資料型別以及自定義資料型別的資料進行儲存
• 將陣列中的資料儲存到堆區
• 建構函式中可以傳入陣列的容量
• 提供對應的拷貝建構函式以及operator=防止淺拷貝問題
• 提供尾插法和尾刪法對陣列中的資料進行增加和刪除
• 可以通過下標的方式訪問陣列中的元素
• 可以獲取陣列中當前元素個數和陣列的容量

程式碼結構

MyArray.hpp

#pragma once
#include<iostream>
using namespace std;

template<class T>
class MyArray
{
private
 
:
	T * pAddress;
	int mCapacity;
	int mSize;
public:
	MyArray(int capacity)
	{
		this->mCapacity = capacity;
		this->mSize = 0;
		this->pAddress = new T[this->mCapacity];
	}
	MyArray(const MyArray& arr)
	{
		this->mCapacity = arr.mCapacity;
		this->mSize = arr.mSize;
		this->
 
pAddress = new T[arr.mCapacity];
		for (int i = 0; i < this->mSize; i++)
		{
			this->pAddress[i] = arr.pAddress[i];
		}
	}

	MyArray& operator=(const MyArray& arr)
	{
		if (this->pAddress != NULL)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
			this->mCapacity =
 
 0;
			this->mSize = 0;
		}
		this->mCapacity = arr.mCapacity;
		this->mSize = arr.mSize;
		this->pAddress = new T[arr.mCapacity];
		for (int i = 0; i < this->mSize; i++)
		{
			this->pAddress[i] = arr.pAddress[i];
		}
		return *this;
	}

	void pushBack(const T& value)
	{
		if (this->mCapacity == this->mSize)
			return;
		this->pAddress[this->mSize] = value;
		this->mSize++;
	}

	void popBack()
	{
		if (this->mSize == 0)
			return;
		this->mSize--;
	}

	T& operator[](int index)
	{
		return this->pAddress[index];
	}

	int getCapacity()
	{
		return this->mCapacity;
	}

	int getSize()
	{
		return this->mSize;
	}

	~MyArray()
	{
		if (this->pAddress != NULL)
		{
			delete[] this->pAddress;
			this->pAddress = NULL;
		}
	}
};

陣列類封裝.cpp

#include<iostream>
using namespace std;
#include"MyArray.hpp"

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

void test()
{
	MyArray<int>arr(5);

	for (int i = 0; i < 5; i++)
	{
		arr.pushBack(i);
	}
	cout << "array列印輸出：" << endl;
	printArray(arr);
	cout << "array1的大小：" << arr.getSize() << endl;
	cout << "array1的容量：" << arr.getCapacity() << endl;

	cout << "--------------------------" << endl;
	MyArray<int>arr1(arr);
	printArray(arr1);
	arr1.popBack();
	printArray(arr1);
}

int main()
{
	test();
	return 0;
}