Perhaps it is helpful to know that the interviewer probably didn't know what they were doing in terms of interviewing.
Hopefully you were asked some other questions which were in fact more relevant.
Amrit Agr wrote:
So what is the trick ?
Being interesting to see if there is in fact a correct answer. Just googling suggests that the standard C/C++ answer which, as you noted, is not in fact the same as Managed C++ makes it very unlikely that you can in fact do it without an intermediary. And if possible it would require more consideration than just whether it was a pointer or not.
I have a server written in C++, Client is in JAVA and middle-ware is CORBA, now we are planing to replace CORBA by web Service(SOAP or REST). we don't want to make any changes in our business logic just want to replace CORBA by web service. Can anyone give some idea how do i approach. since I googled a lot, how to write a REST or SOAP service in C++ but didn't get any lead.
Please do let me know if you seek any further info
here, p is a pointer to int*.that means p can point to an int pointer and that pointer will point an int type of data.
when you do this , (int**) new int (5) ; you are actually forcing (casting) p to point to an int pointer (memory address) with value 5 ..(It actually should not be done because you don't know anything about memory address 0x5 )... however and as you made p to store something(a memory address with value 5) you also allocated memory for that purpose ......
and the typecasting was necessary as first case is very different than the second case....
in the second case --- ap is an int pointer and with new command you allocated 4 bytes of memory for ap .. and ap is now pointing to that memory location and as you passed 20 in the constructor so now that memory address is storing 20....
But, p is not an int pointer ..it's a pointer to int pointer ...so it should be passed a valid memory address in the constructor call .. not an int(what you did -- by passing 5)..that's why you had to cast...
and the answer to your last question is ... p is just a pointer (it maybe a pointer to another pointer but it still is a pointer)..and when we want to know what value a pointer is pointing to we put * (deference op.) before that pointer (only once)!
Hope,you got that
I am a beginner in programming and have to write a solitaire program(C++) just like what we play in windows. I have no idea where or how I should start my program. I never write a game in any computer language and I have already stuck at the beginning for 2 weeks. Can you help??
btw I just need to finish the game logic and give it to my teammate to work on graphic(GUI).
now I just write a few line about checking whether the move in those 7 piles are valid or not and create 52 cards in a class by using array but cannot generate each card uniquely.
That is not a simple question to answer in a forum like this. You should start with a couple of classes:
Card - contains properties such as value and suit.
Player - contains a List of cards.
Some general methods:
A randomiser that deals the cards around.
Play that selects a card and figures out where it can be placed
Quite a lot to think about before you start coding, or worrying about the UI.
Dear all. I am using kinect SDK2.0. Kinect sensor 2.0; visual studio 2012 & openCV 2.4.10 installed in my system.\
I am new to this kinect platform.I am looking for c++ code test some simple code. I have tested code with SDK2.0 . those are working fine. But i didnt find the code where they add images features resources . code to track object
I would like to detect object like in youtube video <a href="https://www.youtube.com/watch?v=bSeFrPrqZ2A">object tracking using opencv</a>[<a href="https://www.youtube.com/watch?v=bSeFrPrqZ2A" target="_blank" title="New Window">^</a>]
Hooking is about capturing messages that are sent ot other applications. If you want to send a message then you just need to use the SendMessage function[^]. Although you will first need to get the handle to the Window via FindWindow[^].
I used the SendMessage() function many and many times, what it did is only close the handled application!!
I used also, PostMessage() and it did the same!
I used sendInput() and there is no response at all..
that's why I went to hook..
otherwise If there is a reliable way I will not go to hooking at all..
could you help in this please,,
if you need some code i will post, but if you provide me with a reliable code that can really send the mouse event to the application without moving the cursor, I will be thankful for you really
MOUSEEVENTF_MOVE is not a valid Windows message; you are just sending nonsense values.
The debugger message is just telling you that the Handle's value does not point to a valid portion of memory. This is expected since handles are arbitrary values used by the Windows OS.
You need to understand the use of all the windows messages which all have names beginning WM_, and are documented in MSDN. The links I gave you earlier will lead you to some of them. You can also look at the SendInput function[^] which may make it easier to achieve what you want.
Sorry, this site does not provide a service like this. You need to use your debugger to identify where the crash occurs and why. You can then come back here with the details, and people will try to help you.
I'm not sure that this is anything to do with managed C++/CLI, however ...
If you have a problem with some code that you downloaded from the internet, then you need to go back and talk to the person or people who provided it. But something called workingbutcrap is not very inspiring. And if you have issues with an article here on CodeProject then you should use the forum at the end of the article.
I'm facing the following strange problem using MFC Grid Control (by Chris Maunder) in my VS2010 MFC application:
I've included the CGridCtrl control in a dialog in order to let the user to edit data. It works fine but sometime when I open the dialog the cells content is not displayed but it's covered by the cell background color.
Unfortunately I can't solve the problem because it only happens randomly. I tried to call Invalidate() to both the CGridCtrl control and the dialog but it doesn't solve.
I want to save the ASCII characters, in this case i started with the "☺" when someone press alt+1.
I dont know how to save that type of characters in the txt. What can i do?
Ive searched like a month about this, in all kind of forums, asking my teachers or people who knows and nobody can answer me this.
A possible solution was to make all again and use HOOK functions and some others like: WH_KEYBOARD_LL. Well... i dont know how to use any of that functions, so its a big problem.
First of all if you want handle characters that are out of standard printable set, and could be filtered by text handling, open the file as binary:
FILE *txt = fopen("Experimento.txt", "ab+");
In this case you have to manually handle end of line adding "\r\n" at end of each line isteade of the simple "\n", but you are free to store the whole set untouched.
Anyway even using standard text file opening there could be a couple of issues that you have to deal with. Just to be sure that the correct code has been saved in the output file open it in a binary editor and verify that the code 0x01 has been stored in the file, if it is not there you can try to open the file in binary mode, as reported above, or you can use putc instead of fprintf:
But if the file is correct and 0x01 is in but you cannot visualize it the problem is a different one, if you can't show it in a console window or in a text editor the problem is that the ascii code you expect is not in the codepage used on your system. In this case the things get somewhat harder...
I am trying the display the transparent ".png" image on the button it is working fine if i have the proper resource file but the situation is like that i have to get the image from a file and Load it on the button how do i do it please any kindly help me.
This array shows music times: 1 - 1/2 - 1/4 - 1/8 and so on.
I think it should be written by recursive function, because I couldn't do it by while and for loop.
Now, I need all sorted figures that sum of them are equal 1. For example:
1/2 - 1/2
1/2 - 1/4 - 1/4
1/4 - 1/2 - 1/4
1/4 - 1/4 - 1/2
1/4 - 1/4 - 1/4 - 1/4
1/8 - 1/2 - 1/4 - 1/8
1/8 - 1/2 - 1/8 - 1/4
1/8 - 1/2 - 1/8 - 1/8 - 1/8
Of course, number of figures will be too many more if we add 1/16 and 1/32 and ... .
I can print them in a web page(response.write) or in a c console; it's not important. But the algorithm should be as simple as possible.
Thank you all.
HackerMan has a message in form of digits but he wants to decode the message so that if enemies gets hold of the message they will not be completely able to decode the message.
Since the message consists only of number, So decoding involves reversing the number. The first digit becomes last and vice versa. For example, if there is 1245 in the code, it becomes 5421 now.
Note : All the leading zeros are omitted. That means if the number ends with a zero, the zero is lost by reversing (e.g. 1200 gives 21).
HackerMan is further thinking of complicating the process and he needs your help. Your task is to add the numbers after reversing and output the result after reversing the sum.
The input consists of N cases. The first line of the input contains only positive integer N. Then follow the cases. Each case consists of exactly one line with two positive integers separated by space. These are the reversed numbers you are to add.
For each case, print exactly one line containing only one integer - the reversed sum of two reversed numbers. Omit any leading zeros in the output.
The value of N will be less than 10000.
The value of digits will be less than 5000.
When I run the command line app I can debug through the cpp dll into the C# dll but when I return from the cpp dll I get error on returning to the debug commanline app.
I get error:
An unhandled exception of type 'System.AccessViolationException' occurred in mscorlib.dll
Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
but i keep getting errors from
control.cpp, output.cpp, tessedit.cpp and tesseractemginewrapper.cpp
the error are all the same stating error C1010: unexpected end of file while looking for precompiled header. did you forget to add '#StdAfx.h' to your source?
as i am completely new i tried with/without the StdAfx.h and StdAfx.cpp which was there when i first created the project.
The message is telling you exactly what is wrong. Your project is set to use precompiled headers, but you forgot to include StdAfx.h in your source code. Each source file (.cpp file) should include the following line at the top:
When this event gets activated, does the event args structure get cloned for each object instance that subscribes to the event, or is there a single instance of the event object with each event handler getting a managed pointer to the same object?
What I'm really getting to is whether the large array gets cloned for each event handler. I'm guessing no.
Many thanks in advance for any pointers (no pun intended...)