e*********l
发帖数: 136 | 1 Base *basePtr = new Derived()
~basePtr()
destructor如果不是virtual的话就出问题了 |
|
l*****a
发帖数: 14598 | 2 为啥一定要有derive class?
没有的话也declare成virtual 吗？ |
|
d*******u
发帖数: 186 | 3 If you have some resources which have to be released in the base class,
the destructor has to be defined as virtual, otherwise only the destructor
of the inherit be called. |
|
C***y
发帖数: 2546 | 4 有没有办法强制基类中定义的pure virtual function在所有的继承类中实现
For example:
class A
{
public:
virtual void func() = 0;
};
class B: public A
{
public:
void func() { std::cout<<"In B"<
};
class C: public B
{
public:
void func() { std::cout<<"In C"<
};
class C中也必须实现 func，否则报错 |
|
C***y
发帖数: 2546 | 5 有没有办法强制基类中定义的pure virtual function在所有的继承类中实现
For example:
class A
{
public:
virtual void func() = 0;
};
class B: public A
{
public:
void func() { std::cout<<"In B"<
};
class C: public B
{
public:
void func() { std::cout<<"In C"<
};
class C中也必须实现 func，否则报错 |
|
c**********e
发帖数: 2007 | 6 What is the output of the following code? Why?
#include
using namespace std;
class student {
public:
virtual void sleep() { cerr << "student sleep" << endl; }
};
class grad: public student {
public:
virtual void sleep() { cerr << "grad sleep" << endl; }
};
void exam(student& stu) {
stu.sleep();
}
void main() {
grad g;
exam(g);
} |
|
|
e*********l
发帖数: 136 | 8 在
可以想一下有木有virtual constructor |
|
|
c**********e
发帖数: 2007 | 10 class A {
public:
virtual int foo()=0;
};
A::foo() { return 0; }
That is can we have a function as pure virtual function
and also have defination like above?
Justify your answer. If yes, then tell me one situation
where we use that. If not tell me why not. |
|
m********1
发帖数: 31 | 11 #include
class Base
{
public:
virtual void Fun()=0;
};
void Base::Fun()
{
cout<<"\n I am in Pure virtual function\n";
}
class Derived : public Base
{
public:
void Fun()
{
cout<<"\n I am in the Derived class";
Base::Fun( );
}
};
int main(int argc, char * const argv[])
{
Derived d;
Base *b = &d;
b->Fun();
return 0;
}
这种情况是可以的 |
|
l**********n
发帖数: 303 | 12 如果不知道继承类如何扩展基类，是否要把所有的functions写成virtual fcns。答案
应该是不要，因为这样有running time performance penalty。 但是既然不知道继承
类如果扩展，应该如何处理，又不能全部写成virtual，但是这些fcn有可能被继承类扩
展 |
|
|
f********a
发帖数: 165 | 14 在constructor里调用virtual function：
c++
struct A
{
A()
{
x();
}
virtual void x()
{
cout<<"A"<
}
};
struct B: public A
{
B()
{
x();
}
void x()
{
cout<<"B"<
}
};
int main()
{
B b;
A* a = new B;
a->x();
}
A
B
A
B
B
如果是java的话： b b b b b
哪位解释下为何c++里是用的父类的而在java里用的子类的。 |
|
G***l
发帖数: 355 | 15 因为在C++里，constructor执行完之前，object还不算存在。x = new B()会先调用A的
contructor,这时候x还不知道自己是B，那个vtable也没有建立，所以根本就无从调用B
的方法，就算你那个方法声明是virtual的，也没法dynamic binding，只能调用A里的。
java在没有执行A constructor的时候，类似c++ vtable的那些东西都已经建立好了。
所以能调用到B的方法。
但是不管在c++还是java里，constructor里调用virtual method都是很糟糕的东西，绝
对不应该做，面试的人问这个很脑残。 |
|
发帖数: 1 | 16 Title : Senior Architect – Virtual Reality
Location: San Jose, CA
work type: full-time
salary: 160-180K+ bonus+ stock option
About Vipshop
VIPShop US Inc., the US R&D center of VIPShop Holdings Limited (NYSE: VIPS),
focuses on advanced research and technology development in the areas of
Mobile platform, Big data system and emerging technologies.
Vipshop Holdings Ltd, a NYSE-listed company (NYSE: VIPS) is a leading online
discount
retailer for brands in China. The Company offers high quality and... 阅读全帖 |
|
发帖数: 1 | 17 Title : Senior Virtual Reality engineer
Location: San Jose, CA
work type: full-time
salary: 160-180K+ bonus+ stock option
About Vipshop
VIPShop US Inc., the US R&D center of VIPShop Holdings Limited (NYSE: VIPS),
focuses on advanced research and technology development in the areas of
Mobile platform, Big data system and emerging technologies.
Vipshop Holdings Ltd, a NYSE-listed company (NYSE: VIPS) is a leading online
discount
retailer for brands in China. The Company offers high quality and p... 阅读全帖 |
|
d**8
发帖数: 1 | 18 We are looking to fill a senior Java Virtual Machine R&D Engineer @ Intel
Oregon. Candidates must have thorough understanding of Java Virtual Machine
internals and hardware architecture. Must have MS or Ph.d in CS or EE. Ph.d
is preferred. If interested, send your resume to m*********[email protected]. |
|
p****x
发帖数: 4260 | 19 ☆─────────────────────────────────────☆
AlPacino (潜伏中) 于 (Thu Jun 25 22:46:00 2009, 美东) 提到:
link:
https://www.pncvirtualwallet.com/
PNC Bank has a new online banking product called Virtual Wallet which
combines multiple bank accounts and online money management tools into one
site.
Virtual Wallet is comprised of 3 accounts working together:
• Your SPEND account is a non-interest-bearing checking account.
• Your RESERVE account is an interest-bearing checking account used
for sho |
|
O***C
发帖数: 1219 | 20 比如我想从ALLYBANK那里设置ACH IN 1000美刀 FROM PNC virtual wallet。
那么这1000美刀将从PNC virtual wallet的哪一个账户转出呢？SPENDING,RESERVE还是
GROWTH？假如我只有GROWTH账户里的钱多于1000，能够转账成功么？
谢谢! |
|
a***a
发帖数: 434 | 21 在网上买东西,用virtual number,卖家先尝试charge $1
剩下的会晚点charge，就相当于这个virtual number会再被charge一次，不会通不过吧 |
|
|
m********8
发帖数: 332 | 23 注册公司的所有有关的地址都是填virtual address。
可以用virtual address申请EIN？ 还是只能用自己家里地址？
谢谢！ |
|
B****n
发帖数: 1404 | 24 文中的Connectix 03年被微软收购，所以Virtual PC现在是微软产品
什么是虚拟机软件
================
虚拟机软件可以在一台电脑上模拟出来若干台PC，每台PC可以运行单独的操作系统而互
不干扰，可以实现一台电脑“同时”运行几个操作系统，还可以将这几个操作系统连成
一个网络。
比如上图中，是在一台电脑上安装了Win2000 server，再在Win2000 server上安装虚拟
机软件VMWare，利用VMWare模拟出来3台PC，在这3台PC上分别运行RedHat7.2、Win98和
Solaris 8 for x86操作系统。包括Win2000在内，这4个操作系统同时在一台电脑上运行
，互不干扰，并且同在一个局域网内。
目前PC上的虚拟机软件有下述两个：
VMWare http://www.vmware.com
Virtual PC http://www.connectix.com
本文主要介绍VMWare。
有关vmware的文章：http://xker.com/edu/os/025/0651910341266484.html
使用 |
|
p**********g
发帖数: 17 | 25 This Virtual Campus Tour of OverseaTalents intends to reach out to students
cross the United States and equip them with helpful tools on OverseaTalents.
com to better manage their career in the future.
We will host our second event about How to Get into Finance and Engineering
Industries at Cornell University/online. The better thing is you can join
our conference staying home comfortably via Internet!
Event Agenda:
● 8:00-8:05pm Opening remark (Dr. Bo Zhou, Co-founder of OverseaTalents.com)
● ... 阅读全帖 |
|
|
a***f
发帖数: 20 | 27 The trend is running everything through CLOUD so the box can be lightweight
and easy maintenance. Some people also refer to SaaS now. virtual machine
running on local is fun for home user, not the trend.
It does not matter if you are using VNC, citrix or VDI to connect virtual
desktop. The key thing is speed. If you play onlive, you will see the speed
difference.
BTW, the next iPad 3 will have quadcore cpu and how many users has quad core
PC now? But they still will not try to run win7 on locall... 阅读全帖 |
|
S****3
发帖数: 135 | 28 系统是3.1U的，一直没升过级
下载了点virtual console的wad安装包，听说wiiware基本都要升级，virtual console
不知道需不需要升级？ |
|
e******e
发帖数: 10121 | 29 虚拟吉他手分两个版本steingerg virtual guitarisr 和steinberg virtual guitarist
elctric edition大部分人多用的是前者，其中包括了电琴和箱琴音色，后者是专门电琴
的。用的人不多。
我一直在cubase理调用作为vst插件，水果我不很熟悉。很少用
音色很好感觉，无论是箱琴还是电琴，感觉其他插件的箱琴音色一律全像是电钢琴，和真
正吉他出入很大，不像。这里的声音很逼真，还有箱琴吉他新弦蹭弦的效果声，设计得挺
巧妙。尤其是金属音色，我喜欢里面的Ultra I 音色。只可惜他不是简单采样模
拟音色，而是演奏制顶好的节奏。
现在还在研究究竟在score editor里怎么随心所欲的记普来触发它的节奏，达到自己想要
的效果。还不是很明白，以前我也在这里问过，不知有没有人有兴趣一起研究。
网上也没见，要是有原版手册就好了。 |
|
|
S**I
发帖数: 15689 | 31 error message: ... bootcamp.vmdk missing, right? If this is the case, its not a big problem; just delete the bootcamp virtual machine from the virtual machine library and let VMWare Fusion reconfigure it.
partition
should |
|
v****e
发帖数: 19471 | 32 How do you delete the disck and add it back? Thanks.
not a big problem; just delete the bootcamp virtual machine from the
virtual machine library and let VMWare Fusion reconfigure it. |
|
S**I
发帖数: 15689 | 33 when you open VMWare fusion, a virtual machine library is shown (if not,
right click icon on the dock -> show virtual machine library), bootcamp is
listed in the library, right click it and select delete; then set up
bootcamp again. |
|
i*****o
发帖数: 1714 | 34 因为软件版本的问题，一直在用两台机器。现在想合起来，到底是bootcamp还是
virtual box？两个都是osx。我没有vmware，想用vm，就是不知道virtual box行不行
。各位大佬有什么建议？
★ 发自iPhone App: ChineseWeb 7.5 |
|
w*s
发帖数: 8 | 35 I use Apache 1.3 and Tomcat 3.1 to set up the webserver on
my pc
(windows 2000 professional).
I want to host sever sites on the sever (such as
www.barand1.com and
www.brand2.com), and it seems that
virtual hosts work well with Apache.
But the virtual hosts does not work well with Tomcat.
When I put the jokes.jsp file into /root directory, it
works fines
http://www.brand1.com/jokes.jsp
But when I put the file jokes.jsp into /root/brand1
directory, it does
not work (file not found)...
(also ht |
|
c*******i
发帖数: 160 | 36 Virtual Machines: Versatile Platforms for Systems and Processes" by Jim
Smith and Ravi Nair |
|
R******a
发帖数: 1195 | 37 My host machine is Win7, and virtual machine is Windows Server 2008 R2 on
VMWare player. I could access the shared folder from my virtual machine by
running \\xxx-PC\sharedfile and input username and pw. But after a few days
I suddenly found I can't access the sharedfile by the same way. The error
said I don't have permission. Don't know why. Is there any other easy ways
of sharing files?
Thanks! |
|
z**r
发帖数: 17771 | 38 sure you can. the virtual machine doesn't know it's a virtual machine.
everything is still same as a real machine
use
windows |
|
n*w
发帖数: 3393 | 39 公司的vpn软件是2002年的nortel（windows的）。不想直接装在自己的pc上。原因：
1. 一旦用vpn连接上。local的所有traffic都走公司的vpn。很多网站被公司block了。
2. 软件太旧，不知道会不会和windows 7有没有问题。
现在是把vpn装在一个vitual box的Windows xp里。然后用xp的mstsc远程打开公司的pc
。问题：
- 不能用多显示器，如果用seemless模式，virtual machine的窗口不能移出primary
monitor。
以下解决方法可行不？
- 还用virtual machine run vpn。双网卡，vpn用一个。另一个网卡用来接受host的mstsc连
接？具体怎么操作？
在host上，
mstsc guest_xp:9001 #登录到公司desktop
mstsc guest_xp:9002 #登录到公司server 1
... |
|
|
x*********n
发帖数: 28013 | 41 cluster怎么会和virtual chassis扯上的啊。
而且，virtual chassis不是J家专有的，打开6500白皮书，里面也是VC，还有VM，所有
的都是这么叫的。
倒是C家的nexus好像是用另外一个IOS，扩展性好一点，没用过，听cisco过来的人说，
听上去很牛。
地址 |
|
L******t
发帖数: 1985 | 42 Where is Cisco's virtualized router supposed to be used?
Cisco also got virtualized switch called Nexus 1000v.
release |
|
w*********t
发帖数: 928 | 43 为啥我的一个virtual machine, 换了机器就不让我用呢？
要是只能在同一台机器上使，virtual machine还有啥意义？ |
|
c**i
发帖数: 6973 | 44 Compare
(1) Lee Gomes and Taylor Buley, The PC Is Dead. Well, not quite yet. But
among corporate customers, the future is beginning to look very uncertain.
Forbes, Dec. 28, 2009 (title in the print; cover date)
http://www.forbes.com/forbes/2009/1228/technology-virtualization-vmware-wyse.html
(virtual computing)
with
(2) Brad Stone and Claire Cain Miller, Music Forecast: In a Cloud; Streaming
Songs, Not Downloading, Could Be the Future. New York Times, Dec. 16, 2009
(title in the print).
http://w |
|
i****a
发帖数: 36252 | 45 how do you get virtual PC to work? do you have to download XP mode first?
I downloaded and installed Virtual PC without XP mode last night and it
shows me windows explore when I run it |
|
x**m
发帖数: 941 | 46 Microsoft Virtual PC (需要VT)和Microsoft Virtual PC 2007不一样的. |
|
m***b
发帖数: 265 | 47 以下解决方法可行不？
- 还用virtual machine run vpn。双网卡，vpn用一个。另一个网卡用来接受host的
mstsc连
接？具体怎么操作？
1 用virtual machine run vpn。双网卡, 并且打开 共享( NAT)
2 在host上，需要添加一个静态路由， 如果是到公司的IP， 走VM的NAT |
|
r*******t
发帖数: 8550 | 48 Virtual Machine要不断update the virtual machine file |
|
r*******t
发帖数: 8550 | 49 How to check whether Virtualization is turned ON/OFF?
I am not sure whether BIOS did turn on or off the virtualization feature. |
|
