第一步:类的设计
MyArray.h
#pragma once
#include<iostream>
using namespace std;
class Array//创建一个Arry类
{
public:
Array(int length);//有参构造函数
Array(const Array&obj );//拷贝构造函数
~Array();//析构函数
public:
void setData(int index,int valude);//设置数据
int getData(int index);//获得数据
int length();//获得长度
protected:
private:
int m_length;
int *m_space;
};
第二步:写类的实现
MyArray.cpp
#include "MyArray.h"
Array::Array(int length)
{
if (length < 0)
{
m_length = 0;
}
m_length =length;
m_space = new int[m_length];//指针变量 = new 类型[表达式];从堆内存分配一块“类型”大小的内存空间,返回首地址
}
//Array a2 = a1;
Array::Array(const Array&obj )//拷贝构造函数
{
this->m_length = obj.m_length;
this->m_space = new int [this->m_length];// 分配内存空间
for (int i=0;i<m_length;i++)//数据元素赋值
{
this->m_space[i] = obj.m_space[i];
}
}
Array::~Array()
{
if (m_space != NULL)
{
delete[] m_space;
m_length = 0;
}
}
//a1.setData(i,i);
void Array::setData(int index,int valude)
{
m_space[index] = valude;
}
int Array::getData(int index)
{
return m_space[index];
}
int Array::length()
{
return m_length;
}
Test_MyArray2.cpp
#include<iostream>
using namespace std;
#include "MyArray.h"
//类的框架设计设计完毕
//累的测试案例
int main()
{
Array a1(10);
for (int i=0;i<a1.length();i++)
{
a1.setData(i,i);
}
cout<<"输a1: "<<endl;
for (int i=0;i<a1.length();i++)
{
cout<<a1.getData(i)<<" ";
}
Array a2 = a1;
cout<<"输a2:"<<endl;
for (int i=0;i<a1.length();i++)
{
cout<<a1.getData(i)<<" ";
}
system("pause");
return 0;
}