C++——对象数组

Coordinate.h

#include "stdafx.h"
#include <iostream>


using namespace std;

class Coordinate
{
public:
	Coordinate();
	~Coordinate();

	int i_x;
	int i_y;
};

Coordinate.cpp

#include "stdafx.h"
#include <iostream>
#include "Coordinate.h"

using namespace std;

Coordinate::Coordinate()
{
	cout << "Coordinate::Coordinate()" << endl;
}
Coordinate::~Coordinate()
{
	cout << "Coordinate::~Coordinate()" << endl;
}

main.cpp

// ConsoleApplication3.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <iostream>
#include "Coordinate.h"

int _tmain(int argc, _TCHAR* argv[])
{
	Coordinate  c[3];
	c[0].i_x = 1;
	c[0].i_y = 2;

	Coordinate *p = new Coordinate[3];
	p->i_x = 10;
	p[0].i_y = 20;

	p++;
	p->i_x = 40;
	p->i_y = 50;

	p++;
	p->i_x = 60;
	p[0].i_y = 70;

	for (int i = 0; i < 3; i++)
	{
		cout << "c[" << i << "].x = " << c[i].i_x << endl;
		cout << "c[" << i << "].y = " << c[i].i_y << endl;
	}

	for (int j = 0; j < 3; j++)
	{
		cout << "p[" << j << "].x = " << p->i_x << endl;
		cout << "p[" << j << "].y = " << p->i_y << endl;
		p--;//前边经过了两次的p++，现在p指向p+2的位置，所以要从后往前遍历
	}
	
	p++;//没有p++将会出现错误，因为执行了for循环，p指针指向的垃圾值，要将p重新指向p[0]的位置
	delete []p;
	p = NULL;

	system("pause");
	return 0;
}