class 4

// omputer.h: interface for the Computer class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_OMPUTER_H__2C841290_BF9E_410C_960A_9E152D78E5D0__INCLUDED_)
#define AFX_OMPUTER_H__2C841290_BF9E_410C_960A_9E152D78E5D0__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include<string>
using std::string;

class Computer
{
int nCPUs;
int cpuFreq;
string cpuBrand;

public:
//有默认参数的函数起到重载函数的作用
Computer(int n=1);//Computer(); //default constructor

virtual ~Computer();//destructor

};

#endif // !defined(AFX_OMPUTER_H__2C841290_BF9E_410C_960A_9E152D78E5D0__INCLUDED_)

int main()
{
Computer acer;//默认初始化
int x(3);
int y;
Computer hp(16);
Computer *p=NULL;
p = new Computer(("Cortex"),4);

Computer dell(string("intel"),8,3.2);
Computer IBM(string("AMD"));
if(p)
delete p;
Computer *q= new Computer[4];//对象数组
delete []q;
Computer w101[60]={{},{},{}};//对象初始化
//Computer a{string("Intel"),7,2.4};新版本的初始化，vc6.0不支持
return 0;
}

// computer.cpp: implementation of the computer class.////////////////////////////////////////////////////////////////////////#include "computer.h"#include<iostream>using std::cout;using std::endl;Computer::Computer(int n){nCPUs=n;cout<<"内核:"<<n<<endl;cout<<"默认构造函数"<<endl;}Computer::~Computer(){cout<<"析构函数\t";cout<<"销毁电脑的CPU核心数："<<nCPUs<<endl;}