寫一個數組類，實現相關函式，自定義建構函式能設定陣列大小，獲取陣列長度，獲取陣列的元素，

完成陣列的拷貝建構函式，允許兩個陣列物件互相賦值

#ifndef __MYARRAY_H__
#define __MYARRAY_H__

class Array
{
public:
	Array(int len)
	{
		m_len = len;
		m_arr = new int[len];
	}
	~Array()
	{
		if(m_arr != NULL)
		{
			delete []m_arr;
			m_arr = NULL;
		}
	}
	Array(const Array &obj);
	int length();
	void setData(int index, int data);
	int getData(int index);
private:
	int m_len;
	int *m_arr;
};

#endif //__MYARRAY_H__
 

#include <stdio.h>
#include "MyArray.h"

int Array::length()
{
	return m_len;
}

void Array::setData(int index, int data)
{
	m_arr[index] = data;
}

int Array::getData(int index)
{
	return m_arr[index];
}

Array::Array(const Array &obj)
{
	int i;
	m_len = obj.m_len;
	m_arr = new int[obj.m_len];
	for(i=0; i<obj.m_len; i++)
	{
		m_arr[i] = obj.m_arr[i];
	}
}
 

#include <iostream>
#include "MyArray.h"
 
using namespace std;
 
int main()
{
    Array  a1(10);
 
    for (int i=0; i<a1.length(); i++)
    {
        a1.setData(i, i);
    }
 
    cout<<"\n列印陣列a1: ";
    for (int i=0; i<a1.length(); i++)
    {
        cout<<a1.getData(i)<<" ";
    }
    cout<<endl;
 
    // 完成陣列的拷貝建構函式，允許兩個陣列物件互相賦值
    Array a2 = a1;
    cout<<"\n列印陣列a2: ";
    for (int i=0; i<a2.length(); i++)
    {
        cout<<a2.getData(i)<<" ";
    }
    cout<<endl;
    return 0;
}