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  • Multiple-File Template Implementation

    - by Maxpm
    With normal functions, the declaration and definition are often separated across multiple files like so: // Foo.h namespace Foo { void Bar(); } . // Foo.cpp #include "Foo.h" void Foo::Bar() { cout << "Inside function." << endl; } It is my understanding that this cannot be done with templates. The declaration and definition must not be separate because the appropriate form of the template is created "on-demand" when needed. So, how and where are templates typically defined in a multiple-file project like this? My intuition is that it would be in Foo.cpp because that's where the "meat" of functions normally is, but on the other hand it's the header file that's going to be included.

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  • Can I use #undef this way?

    - by flyout
    I want to get some settings I store in the registry, and if they differ from a #define I want to redefine it, could I do it this way?: #define DEFINED_X "testSetting" void LoadConfig() { regConfigX = some value previusly stored in the registry; if(regConfigX!=DEFINED_X) { #undef DEFINED_X #define DEFINED_X regConfigX } } I tought #define was used only when compiling, would this code work when running the compiled exe?

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  • Device Emulator not recognized in windows when I press cradle

    - by JasperT
    Hi Experts, Who can help me with this: I am working on Win7 x64, with VS.net 2008. I am developping for pocketpc. When my application is deployed to the device emulator it can't connect to my computer / db server. Both de emulator as well the mobile device center are configured to use DMA. When I cradle the device using device manager, nothing happens. What can I try? Greets, Jasper

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  • The program fails to display `cout` when it is run

    - by Jeff - FL
    Hello, I justed started a C++ course & I wrote, compiled, debugged & ran my first program: // This program calculates how much a little league team spent last year to purchase new baseballs. #include <iostream> using namespace std; int baseballs; int cost; int total; int main() { baseballs, cost, total; // Get the number of baseballs were purchased. cout << "How many baseballs were purchased? "; cin >> baseballs; // Get the cost of baseballs purchased. cout << "What was the cost of each baseball purchased? "; cin >> cost; // Calculate the total. total = baseballs * cost; // Display the total. cout << "The total amount spent $" << total << endl; return 0; } The only probelm that I encountered was that when I ran the program it failed to display the total amount spent (cout). Could someone please explain why? Thanks Jeff H - Sarasota, FL

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  • Can I automatically overwrite repository files using svn_load_dirs.pl or similiar?

    - by Andy Strang
    I am working with a legacy VSS repository which was transferred over to a new SVN repository a few months ago. In the meantime, before we go live with the SVN repository, we need to bring over all the changes that have happened on the VSS one between then and now. I was looking at different ways to do this which seem to be things such as: 1.) svn_load_dirs.pl then merge the files manually? 2.) svn import straight into the trunk and merge files manually 3.) checkout a working copy of my SVN repository, copy in the changed files which will overwrite some of the ones in my working copy then commit the changes. My question is, can any of these options be used (or any other options) to automate things so that I don't have to merge the files, and can instead just overwrite them? I think only Option 3 would do this but any help is appreciated.

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  • Listening UDP or switch to TCP in a MFC application

    - by Alexander.S
    I'm editing a legacy MFC application, and I have to add some basic network functionalities. The operating side has to receive a simple instruction (numbers 1,2,3,4...) and do something based on that. The clients wants the latency to be as fast as possible, so naturally I decided to use datagrams (UDP). But reading all sorts of resources left me bugged. I cannot listen to UDP sockets (CAsyncSocket) in MFC, it's only possible to call Receive which blocks and waits. Blocking the UI isn't really a smart. So I guess I could use some threading technique, but since I'm not all that experienced with MFC how should that be implemented? The other part of the question is should I do this, or revert to TCP, considering reliability and implementation issues. I know that UDP is unreliable, but just how unreliable is it really? I read that it is up to 50% faster, which is a lot for me. References I used: http://msdn.microsoft.com/en-us/library/09dd1ycd(v=vs.80).aspx

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  • I can't apply prefast /StackHogThreshold option.

    - by Benjamin
    I'm using ddkbuild for building my driver. And I use prefast also. Prefast has /StackHogThreshold option. The default value is 1024 Bytes. But I can't modify the value. It's my input for 'Rebuild All Command Line' C:\Windows\System32\cmd.exe /k "$(SolutionDir)....\ddkbuild.bat" -WIN7WLHA64 -prefast free $(ProjectDir) -cZ

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  • warning about data loss c++/c

    - by Dr Deo
    i am getting a benign warning about possible data loss warning C4244: 'argument' : conversion from 'const int' to 'float', possible loss of data question i remember as if float has a larger precision than int. So how can data be lost if i convert from a smaller data type (int) to a larger data type (float)

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  • FileSystemWatcher surpassing Active Directory restrictions

    - by DevexPP
    While experimenting with FileSystemWatcher, I've found out that it somehow surpasses Active Directory's restrictions to files and folders, and will raise change events with information about what has changed in files and folders that you don't even have access to. I have two questions about that: 1) Why does this happen ? 2) Is this a problem in the AD configuration ? how do I fix it ? 3) Is there any way to gather these files, or even create a FileSystemInfo of them to get more info about the files (not only the changes made on them) ? As far as I've tried, only the FileSystemWatcher immune to the restrictions, I can't run any other thing over it, here's a list of what I've tried: File.Exists Directory.Exists FileInfo instance on found files DirectoryInfo instance on found files File.Copy File.Delete

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  • How to cast a character to int in Clojure?

    - by Learning Clojure
    How to cast a character to int in Clojure? I am trying to write a rot 13 in clojure, so I need to have something to cast my char to int. I found something called (int), so I put: (int a) Get: CompilerException java.lang.RuntimeException: Unable to resolve symbol: a in this context, compiling:(NO_SOURCE_PATH:13:1) Then I put: (int 'a) Get: ClassCastException clojure.lang.Symbol cannot be cast to java.lang.Character clojure.lang.RT.intCast (RT.java:1087) Then: (rot13 ''a') Get: ClassCastException clojure.lang.PersistentList cannot be cast to java.lang.Character clojure.lang.RT.intCast (RT.java:1087) And: (rot13 "a") Get: ClassCastException java.lang.String cannot be cast to java.lang.Character clojure.lang.RT.intCast (RT.java:1087) So what is the right way to do it? btw, I always get confused with all these clojure syntax. But I can never find any source only help me with my problem. Any suggestions? Thank you!!

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  • Why are developers proud to say our application is XXX lines of code? [closed]

    - by mbcrump
    I admit, I used to do it. I was proud to tell a fellow developer my application is 10K+ lines of code. I thought it was a "Look at me, I'm smart" statement. Time passed and I realized that a experienced developer would be constantly refactoring all of his code. Not only for the sake of remembering what it was doing, but because he realizes he is smarter today than he was yesterday. No longer was it cool to have multiple nested if statements or completely ignoring generics/lambdas. So, whats your take on this? Do you do it and why?

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  • Which is the best pick?

    - by Daniel
    Hi, considering I have experience with Java SE: which language should I learn(and is best for that purpose) in order to build web applications some day with it? I have been contemplating PHP and Java EE. The latter does indeed seems as an obvious choice given my Java SE knowledge. But how does it fares in comparison with PHP and how good is it for the aforementioned purpose? If there is a better language for this purpose, feel free to recommend it. Thank you.

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  • Include a version control tag in VSS

    - by Sjuul Janssen
    I was reading Code Complete 2 and it mentions this: Many version-control tools wil insert version information into a file. In CVS, for exmple the characters // $id$ Will Automaticly expand to // $id: ClassName.java, v 1.1 2004/02/05 00:36:42 ismene Exp $ So now I would like to do something similar with VSS for our SQL scripts I have been googling around for the answer but can't find it. Is this possible? can someone maybe point me in the right direction?

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  • get file path from svn diff file with PHP and C

    - by coderex
    hi i have a file having svn diff i wish to extract the filenames form the diff. How to write the parser for that.. Index: libs/constant.php =================================================================== --- libs/constant.php (revision 1243) +++ libs/constant.php (revision 1244) @@ -26,5 +26,5 @@ // changesss - +// test 2 ?> \ No newline at end of file Index: libs/Tools.php =================================================================== --- libs/Tools.php (revision 1243) +++ libs/Tools.php (revision 1244) @@ -34,5 +34,5 @@ // another file an change - +// test ?> \ No newline at end of file Sample output. libs/constant.php libs/Tools.php How to write parser in PHP and C.

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  • C++ linker unresolved external symbol (again;) from other source file *.obj file. (VC++ express)

    - by bua
    Hi there, I'm back to C/C++ after some break. I've a following problem: I've a solution where I've several projects (compilable and linkable). Now I need to add another project to this solution which depends on some sources from other projects. My new project compiles without any problems (I've added "existing sources" to my project). the error: 1>Linking... 1>LicenceManager.obj : error LNK2019: unresolved external symbol "int __cdecl saveLic(char *,struct Auth *)" (?saveLic@@YAHPADPAUAuth@@@Z) referenced in function "public: void __thiscall LicenceManager::generateLicence(int,char *)" (?generateLicence@LicenceManager@@QAEXHPAD@Z) 1>LicenceManager.obj : error LNK2019: unresolved external symbol "void __cdecl getSysInfo(struct Auth *)" (?getSysInfo@@YAXPAUAuth@@@Z) referenced in function "public: void __thiscall LicenceManager::generateLicence(int,char *)" (?generateLicence@LicenceManager@@QAEXHPAD@Z) Functions saveLic, and getSysInfo are defined in files which I've added to my new project from existing ones. There is object file created during compilation with those functions in target dir, but my LicenceManager class doesn't want to link. I use some extern "C" , and #pragma pack somewhere, but no more fancy stuff. I think every directory, lib and other necessary dependencies are visible in settings for this project. Thanks for any advice.

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  • What's ideal debugging setup? window placement etc.

    - by Padmarag
    I am interested in knowing Debugging setup that'll allow me to be most productive. I am mainly interested in knowing how and where you place different windows like the variables window, code window, the stack. Also possibly the relative size of different windows. I'd prefer if there are screenshots attached and a description of why the setup works for you. I mainly use Eclipse and Netbeans. PS: I am open to making this community wiki if needed.

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  • How might a C# programmer approach writing a solution in javascript?

    - by Ben McCormack
    UPDATE: Perhaps this wasn't clear from my original post, but I'm mainly interested in knowing a best practice for how to structure javascript code while building a solution, not simply learning how to use APIs (though that is certainly important). I need to add functionality to a web site and our team has decided to approach the solution using a web service that receives a call from a JSON-formatted AJAX request from within the web site. The web service has been created and works great. Now I have been tasked with writing the javascript/html side of the solution. If I were solving this problem in C#, I would create separate classes for formatting the request, handling the AJAX request/response, parsing the response, and finally inserting the response somehow into the DOM. I would build properties and methods appropriately into each class, doing my best to separate functionality and structure where appropriate. However, I have to solve this problem in javascript. Firstly, how could I approach my solution in javascript in the way I would approach it from C# as described above? Or more importantly, what's a better way to approach structuring code in javascript? Any advice or links to helpful material on the web would be greatly appreciated. NOTE: Though perhaps not immediately relevant to this question, it may be worth noting that we will be using jQuery in our solution.

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