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  • C++ sort array of char pointers

    - by user69514
    Can you tell me what's wrong with my method? I ends up putting the same thing everywhre and it's actually not sorting. void sortArrays(){ int i, j; for(i=0; i<counter; i++){ for( j=0; j<i; j++){ if( strcmp(title_arr[i], title_arr[j]) < 0){ char* title_temp = title_arr[i]; title_arr[j] = title_temp; } } }

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  • Need some pointers/hints in writing a Windows Application

    - by Bragaadeesh
    Hi, I want to create applications in windows that has complete portability (within windows OSes of course). I have tried using one application written in Visual C++ but I had a real tough time in making it run in other windows OS (like it required .net framework libraries to be installed). This put me on the back foot because I had to copy a set of DLLs from one machine to another and most of the time something works some does not. And I am TOTAL amateur in writing windows based applications since my technological forte is mostly Java. Where to kick off? (like which tools/IDEs to begin with since I am seriously into writing my own utilities/tools). I am open to clarification should you guys feel my question is vague/blunt. Thanks.

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  • Where is the rand php function located? localhost php running, path of default functions?

    - by Bona Chon
    I have a local server installed on my Mac (MAMP). My question is, where I can find the php functions in my computer? What is the path to the functions folder? For instance, rand() time() isset() explode(). I would like to se the code to learn of it. I have a while looking for it, but I can't find it. Or is it that is already compiled? Can someone help me here? I'm kind of lost. Thanks people. EDIT: can you be a little bit more positive? I;m trying to learn here, forgive me if I'm not to smart for you. Thanks again. Explanations would help better than giving links I guess?

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  • C++: Pointers and scope

    - by oh boy
    int* test( ) { int a = 5; int* b = &a; return b; } Will the result of test be a bad pointer? As far as I know a should be deleted and then b would become a messed up pointer, right? How about more complicated things, not an int pointer but the same with a class with 20 members or so?

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  • Function to swap pointers in Objective-C

    - by Michael
    - (void) swapController:(MyViewController*)controller1 with:(MyViewController*)controller2 { MyViewController *swap = controller2; controller2 = controller1; controller1 = swap; } Looks like this doesn't work because I'm not passing references. How to do it anyway?

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  • C++ pointers and constructors

    - by lego69
    if I have this snippet of the code A a1(i); A a2 = a1; A *pa1 = new A(a2); can somebody please explain what exactly the last line does, it makes copy of the a2 and pointer for this new object is pa1 or it just creates pointer for a2, thanks in advance

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  • Pointers in c/c++

    - by jammkie same
    include void main() { int p[]={0,1,2,3,4}; int *a[]={p,p+1,p+2,p+3,p+4}; printf("%u %u %u %u",a,a,(*a)); } What should be the output of the above code? And if we make array p as static(static int p[]), output gets changed .Why?

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  • Assigning variables to pointers

    - by tys
    When compiling the below, the program seem to crash. However, there is no error in the compiling process. ... int *x; *x = 3; printf("%d", *x); ... From what I know, this program initializes the pointer *x to an integer value, and subsequently assigns the value of 3 to the deferenced pointer *x. So why does the program crashes? If I do this instead, the program can work normally. ... int *x, y; y = 3; x = &y; printf("%d", *x); ... So, what seems to be the problem with the skipping of the y variable, and instead, assigning the pointer *x directly to an integer value?

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  • RapidXML - does not compile ?

    - by milan
    Hi, I am novice to rapidXML but first impresion was not positive, I made simple Visual Studio 6 C++ Hello World Application and added RapidXML hpp files to project and in main.cpp I put: #include "stdafx.h" #include < iostream > #include < string > #include "rapidxml.hpp" using namespace std; using namespace rapidxml; int main ( ) { char x[] = "<Something>Text</Something>\0" ; //<<<< funktioniert, aber mit '*' nicht xml_document<> doc ; doc.parse<0>(x) ; cout << "Name of my first node is: " << doc.first_node()->name() << endl ; xml_node<>* node = doc.first_node("Something") ; cout << "Node 'Something' has value: " << node->value() << endl ; } And it does not compile, any help ? Is RapidXML possible to run with Visual Studio 6 ? Error I am getting are: --------------------Configuration: aaa - Win32 Debug-------------------- Compiling... rapidxml.cpp c:\Parser\rapidxml.cpp(310) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(320) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(320) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(385) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(417) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(417) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(448) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(448) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(476) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(579) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(599) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(639) : see reference to class template instantiation 'rapidxml::memory_pool<Ch>' being compiled c:\Parser\rapidxml.cpp(681) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(790) : see reference to class template instantiation 'rapidxml::xml_base<Ch>' being compiled c:\Parser\rapidxml.cpp(700) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(790) : see reference to class template instantiation 'rapidxml::xml_base<Ch>' being compiled c:\Parser\rapidxml.cpp(721) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(790) : see reference to class template instantiation 'rapidxml::xml_base<Ch>' being compiled c:\Parser\rapidxml.cpp(751) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(790) : see reference to class template instantiation 'rapidxml::xml_base<Ch>' being compiled c:\Parser\rapidxml.cpp(786) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(790) : see reference to class template instantiation 'rapidxml::xml_base<Ch>' being compiled c:\Parser\rapidxml.cpp(787) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(790) : see reference to class template instantiation 'rapidxml::xml_base<Ch>' being compiled c:\Parser\rapidxml.cpp(836) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(876) : see reference to class template instantiation 'rapidxml::xml_attribute<Ch>' being compiled c:\Parser\rapidxml.cpp(856) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(876) : see reference to class template instantiation 'rapidxml::xml_attribute<Ch>' being compiled c:\Parser\rapidxml.cpp(936) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(1345) : see reference to class template instantiation 'rapidxml::xml_node<Ch>' being compiled c:\Parser\rapidxml.cpp(958) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(1345) : see reference to class template instantiation 'rapidxml::xml_node<Ch>' being compiled c:\Parser\rapidxml.cpp(981) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(1345) : see reference to class template instantiation 'rapidxml::xml_node<Ch>' being compiled c:\Parser\rapidxml.cpp(1004) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(1345) : see reference to class template instantiation 'rapidxml::xml_node<Ch>' being compiled c:\Parser\rapidxml.cpp(1025) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(1345) : see reference to class template instantiation 'rapidxml::xml_node<Ch>' being compiled c:\Parser\rapidxml.cpp(1045) : error C2039: 'size_t' : is not a member of 'std' c:\Parser\rapidxml.cpp(1345) : see reference to class template instantiation 'rapidxml::xml_node<Ch>' being compiled Error executing cl.exe. rapidxml.obj - 25 error(s), 0 warning(s)

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  • Stairway to PowerPivot and DAX - Level 3: The DAX DISTINCT() Function and Basic Distinct Counts

    Bill Pearson, Business Intelligence architect and author, exposes the DAX DISTINCT() function, and then provides some hands-on exposure to its use in generating distinct counts. Moreover, he further explores working with measures in the PivotTable in this, the third Level of our new Stairway to PowerPivot and DAX series. Optimize SQL Server performance“With SQL Monitor, we can be proactive in our optimization process, instead of waiting until a customer reports a problem,” John Trumbul, Sr. Software Engineer. Optimize your servers with a free trial.

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  • Stairway to PowerPivot and DAX - Level 4: The DAX BLANK() Function

    Business Intelligence architect and author Bill Pearson exposes the DAX BLANK() function, and then provides some hands-on exposure to its use in managing empty values underlying our PowerPivot model designs. Save 45% on our top SQL Server database administration tools. Together they make up the SQL DBA Bundle, which supports your core tasks and helps your day run smoothly. Download a free trial now.

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  • How to use void*

    - by Rondogiannis Aristophanes
    I am imlementing a simple merge function and I have got stuck, as the compiler gives me errors that I cannot explain. Here is my merge function: void merge(void *a, int beg, int middle, int end, int (*cmp)(const void*, const void* { std::stack<void*> first; std::stack<void*> second; for(int i = beg; i < middle; i++) { first.push(a+i); } for(int i = middle; i < end; i++) { second.push(a+i); } for(int i = beg; i < end; i++) { if(first.empty()) { void *tmp = second.top(); second.pop(); a+i = tmp; } else if(second.empty()) { void *tmp = first.top(); first.pop(); a+i = tmp; } else if(cmp(first.top(), second.top())) { void *tmp = first.top(); first.pop(); a+i = tmp; } else { void *tmp = second.top(); second.pop(); a+i = tmp; } } } And here is the error: sort.h: In function `void merge(void*, int, int, int, int (*)(const void*, const void*))': sort.h:9: error: pointer of type `void *' used in arithmetic sort.h:12: error: pointer of type `void *' used in arithmetic sort.h:19: error: pointer of type `void *' used in arithmetic sort.h:19: error: non-lvalue in assignment sort.h:23: error: pointer of type `void *' used in arithmetic sort.h:23: error: non-lvalue in assignment sort.h:27: error: pointer of type `void *' used in arithmetic sort.h:27: error: non-lvalue in assignment sort.h:31: error: pointer of type `void *' used in arithmetic sort.h:31: error: non-lvalue in assignment Can anyone help me? TIA.

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  • IsNullOrDefault generic helper function for nullable types

    - by Michael Freidgeim
    I've wrote  IsNullOrDefault generic helper function       public  static bool IsNullOrDefault<T>(this Nullable<T> param) where T : struct     {         T deflt = default(T);         if (!param.HasValue)             return true;         else if (param.Value.Equals(deflt))             return true;         return false;     }   , but then realized that there is more short implementation on stackoverflow submitted by Josh

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  • Fetching database query through function

    - by Shubham Maurya
    I am sick of connecting database in each script i need a more OOP approach to fetching database results. ex like wordpress use wpdb class to fetch results. This what wordpress does to get data <?php $posts = $wpdb->get_results("SELECT ID, post_title FROM $wpdb->posts WHERE post_status = 'publish' AND post_type='post' ORDER BY comment_count DESC LIMIT 0,4") ?> How can i create the same feature too using any class or function and use it in my script Thank you

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  • How to make a PHP function triggered automatically at a user defined time

    - by mithilatw
    I am developing an internal system for a company with PHP using Zend framework. I need one of its functions to execute on a time specified by user. My research on this matter found me several ways of doing this using CPanel Cron jobs and setting up scheduled tasks on the server. But in this scenario, I don't have a CPanel and I already use scheduled tasks. But my challenge is to provide an interface for the user to specify the time to trigger the function.

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  • LogonUser function (2 replies)

    I am trying to access a server using LogonUser function as follows Dim returnValue As Boolean LogonUser(Domain\UserName, MachineName, password, LOGON32 LOGON NEW CREDENTIALS, LOGON32 PROVIDER DEFAULT, tokenHandle) I get a token, and seems to me that I get authenticated. However when I execute the following Dim AllCountersCategories As PerformanceCounterCategory() PerformanceCounterCategory.GetCate...

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  • LAG function – practical use and comparison to old syntax

    - by Michael Zilberstein
    Recently I had to analyze huge trace – 46GB of trc files. Looping over files I loaded them into trace table using fn_trace_gettable function and filters I could use in order to filter out irrelevant data. I ended up with 6.5 million rows table, total of 7.4GB in size. It contained RowNum column which was defined as identity, primary key, clustered. One of the first things I detected was that although time difference between first and last events in the trace was 10 hours, total duration of all sql...(read more)

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  • LAG function – practical use and comparison to old syntax

    - by Michael Zilberstein
    Recently I had to analyze huge trace – 46GB of trc files. Looping over files I loaded them into trace table using fn_trace_gettable function and filters I could use in order to filter out irrelevant data. I ended up with 6.5 million rows table, total of 7.4GB in size. It contained RowNum column which was defined as identity, primary key, clustered. One of the first things I detected was that although time difference between first and last events in the trace was 10 hours, total duration of all sql...(read more)

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  • alias/function with command line arguments

    - by Agzam
    I'm tired of typing manage.py startserver 10.211.55.4:4000, so decided to make an alias for that. Only thing is: the port sometime changes. So I did this in bash profile: function runserver() { python manage.py runserver 10.211.55.4:$1 } But then when I call it: runserver 3000, it starts it, but immediately stops saying: "Error: That IP address can't be assigned-to". However if I type the same thing right into command line it works with no complains.

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  • c# Wrapper to native c++ code, wrapping a parameter which is a pointer to an array

    - by mb300dturbo
    Hi, I have the following simple DLL in c++ un-managed code; extern "C" __declspec(dllexport) void ArrayMultiplier(float (*pointerArray)[3], int scalar, int length); void ArrayMultiplier(float (*pointerArray)[3], int scalar, int length) { for (int i = 0 ; i < length ; length++) { for (int j = 0; j < 3; j++) { pointerArray[i][j] = pointerArray[i][j] * scalar; } } } I have tried writing the following wrapper function for the above in c#: [DllImport("sample.dll")] public static extern void ArrayMultiplier(ref float elements, int scalar, int length); where elements is a 2 dimentional 3x3 array: public float[][] elements = { new float[] {2,5,3}, new float [] {4,8,6}, new float [] {5,28,3} }; The code given above compiles, but the program crashes when the wrapper function is called: Wrapper.ArrayMultiplier(ref elements, scalar, length); Please help me here, and tell me whats wrong with the code above, or how a wrapper can be written for a simple c++ function: void SimpleFunction(float (*pointerToArray)[3]); Thank you all in advance

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  • pointer, malloc and char in C

    - by user2534078
    im trying to copy a const char array to some place in the memory and point to it . lets say im defining this var under the main prog : char *p = NULL; and sending it to a function with a string : myFunc(&p, "Hello"); now i want that at the end of this function the pointer will point to the letter H but if i puts() it, it will print Hello . here is what i tried to do : void myFunc(char** ptr , const char strng[] ) { *ptr=(char *) malloc(sizeof(strng)); char * tmp=*ptr; int i=0; while (1) { *ptr[i]=strng[i]; if (strng[i]=='\0') break; i++; } *ptr=tmp; } i know its a rubbish now, but i would like to understand how to do it right, my idea was to allocate the needed memory, copy a char and move forward with the pointer, etc.. also i tried to make the ptr argument byreferenec (like &ptr) but with no success due to a problem with the lvalue and rvalue . the only thing is changeable for me is the function, and i would like not to use strings, but chars as this is and exercise . thanks for any help in advance.

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