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  • "An access violation (Segmentation Fault) raised in your program."

    - by Mark
    My C++ program compiles and works up until I call this function from main(): int uword(){fstream infile("numbers.txt"); fstream exfile("wordlist.txt"); string numb[numoflines]; string lines[numoflines]; number = 1; line = 1; for(int i=0;!infile.eof();++i) { getline (infile,number); numb[i] = number; getline (exfile,line); lines[i] = line; } infile.close(); exfile.close(); string yourword; Something here causes it to crash, in the debug it pops up with "An access violation (Segmentation Fault) raised in your program."

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  • Please help me get my content div to get an auto height from absolutely positioned element

    - by Justin Hollender
    I need some help with a CSS layout. It is set up like this: +--------------------+ | | | header | |-| |--------------| | |nav| content | | | | | | | | | | | | | | footer | +--------------------+ So, the nav is supposed to be floating above all the main page content. That's why I have it set to be absolutely positioned. The issue is that the nav items are dynamic, without a set height. Right now, the nav expands past the content. How can I fix it so that the content will have an auto height based off the nav? Thanks in advance.

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  • Reading another packages symbol table in Perl

    - by justintime
    I am trying to read a global symbol from another package. I have the package name as a string. I am using qualify_to_ref from Symbol module my $ref = qualify_to_ref ( 'myarray', 'Mypackage' ) ; my @array = @$ref ; gives me Not an ARRAY reference at ...... I presume I am getting the format of the dereference wrong. Here is a complete example program. use strict; use Symbol ; package Mypackage ; our @myarray = qw/a b/ ; package main ; my $ref = qualify_to_ref ( 'myarray', 'Mypackage' ) ; my @array = @$ref ;

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  • Memory allocated with malloc does not persist outside function scope?

    - by PM
    Hi, I'm a bit new to C's malloc function, but from what I know it should store the value in the heap, so you can reference it with a pointer from outside the original scope. I created a test program that is supposed to do this but I keep getting the value 0, after running the program. What am I doing wrong? int f1(int * b) { b = malloc(sizeof(int)); *b = 5; } int main() { int * a; f1(a); printf("%d\n", a); return 0; }

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  • C# Add class instance with internal timer to a static List, is it safe?

    - by CodeMongo
    My program has a static list of type classA. ClassA implements a threading timer that executes a task. The list may contain as many instances of classA as desired. Is this technique causing threading issues where the class instances can block each other? It that is the case how can I solve the that problem. ex: static List<MyClassType> list=null; void static Main() { list = new List<MyClassType>(); var a = new MyClassType(); var b = new MyClassType(); list.Add(a); list.Add(b); Console.ReadKey(); } a and b will execute theire internal task based on the timer.Is it s bsd technique? Why?

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  • Drupal: does removing these lines from .htaccess cause security issues ?

    - by Patrick
    hi, I had to comment these lines from the htaccess files in my main Drupal folder and in sites folder # Don't show directory listings for URLs which map to a directory. #Options -Indexes # Follow symbolic links in this directory. #Options +FollowSymLinks ...in order to not get a 500 Internal Error on the new server. Can I leave them uncommented or am I going to have security issues ? ps. I've also set all content in files folder 777 permission. Is this ok ? thanks

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  • Why is this C++ code working ?

    - by gregseth
    Why doesn't the program segfault on the p->info() call? struct A { int info() { retrun (this) ? 1 : -1; } }; int main() { A* p = NULL; if (p->info() == 1) { cout << "I'm alive!" << endl; } else { cout << "I'm NULL..." << endl; } return 0; }

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  • trying to sort a simple string in c++

    - by every_answer_gets_a_point
    #include "stdio.h" #include "conio.h" #include <iostream> using namespace std; int main (void) { char my_char[] = "happy birthday"; int i; bool j=false; char my_char_temp[1]; do { for (i=0;i<sizeof(my_char)-2;i++) { j=false; if (my_char[i+1] < my_char[i]) { my_char_temp[0]=my_char[i+1]; my_char[i+1] = my_char[i]; my_char[i] = my_char_temp[0]; j=true; } } }while (j); cout << my_char; } what am i doing wrong? im just trying to sort the letters within the char the output i get is completely wrong

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  • is this code correct? [closed]

    - by davit-datuashvili
    hi i have poste this code from this title http://stackoverflow.com/questions/2896363/hi-i-have-question-here-is-pseudo-code-about-sift-up-and-sift-down-on-heaps i have following code of siftup on heap is it correct?i have put here because i have changed at old place my question and it became unreadable so i have posted here public class siftup{ public static void main(String[]args){ int p; int n=12; int a[]=new int[]{15,20,12,29,23,17,22,35,40,26,51,19}; int i=n-1; while (i!=0){ if (i==1) break; p=i/2; if (a[p]<=a[i]){ int t=a[p]; a[p]=a[i]; a[i]=t; } i=p; } for (int j=0;j<n;j++){ System.out.println(a[j]); } } } //result is this 15 20 19 29 23 12 22 35 40 26 51 17 is it correct?

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  • How to process credit card by using intuit's (quickbook) ?

    - by Grace Ladder
    How to process credit card by using Hello all, I am doing shopping cart project for my client and one of the requirement is using intuit's (http://www.intuit.com/) product to process credit card in real manner, as the client is going to integrate the online shop with quickbook in later stage. My question is, does intuit products purely payment gateway solution? as in this stage, we are not involved with any dev work about quickbook, the main focus for us is deliver the high quality shopping cart solution, we read something about intuit's web shop solution but seems this one require quickbook running in desktop to sync the data? Very confused now, if anyone had experience before, please help!

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  • How to enable `geom_text` to recognize `aes` in QPLOT (R programming)

    - by neversaint
    I have a data that looks like this ensg mirna_hgc time value perc id ENSG00000211521 MIR665 x 89 2.07612456747405 1 ENSG00000207787 MIR98 x 73 1.73010380622837 2 ... ENSG00000207827 MIR30A y 99 21.4532871972318 288 ENSG00000207757 MIR93 y 94 1.73010380622837 289 What I'm trying to do is to create a facet plot with label on top of it. The label can be easily called from the perc column. Using this code: dat.m <- read.delim("http://dpaste.com/1271039/plain/",header=TRUE,sep=" ") qplot(value, data=dat.m,facets=time~.,binwidth=1,main="")+ xlab("Value")+ ylab("Count")+ theme(legend.position="none")+ stat_bin(aes(value,label=sprintf("%.01f",perc)),geom="text") But it gave me this error: Error: geom_text requires the following missing aesthetics: label What I'm trying to do is to generate this plot:

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  • A pointer member variable having different values

    - by Rohan Prabhu
    Ok, to begin with, this is my code: HyperSprite::HyperSprite() { _view = 0; } void HyperSprite::publish(QGraphicsView* view) { _view = view; } void HyperSprite::getKFrame() { if(_view != 0) { qDebug()<<(void*)_view; } } Now, if I call HyperSprite::getKFrame() from within main(), I get the output: 0xbf8ffb84 I have a TCP server, which requires this QGraphicsView* variable. So whenever a new connection is made, HyperSprite::getKFrame() is called. However, whenever I make a connection to my server, this is the output: 0x1e425ff I honestly don't understand this. Shouldn't the value of a member remain same throughout? Why is the pointer value changing? As is obvious, whenever I try to use the _view pointer to access any of its members, a Segmentation Fault occurs. I tried using QSharedPointer, but it also results in the same problem. The data of the QSharedPointer automatically changes. Why is this happening?

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  • Dismissing the keyboard in a UIScrollView

    - by Nicholas1024
    Alright, I have a couple of UITextFields and UITextViews inside a UIScrollView, and I'd like to set the keyboard to disappear whenever the scrollview is touched or scrolled (except when you touch down inside the text field/view, of course). My current attempt at doing this is replacing the UIScrollView with a subclass, and setting it to call a removeKeyboard function (defined inside the main view controller) inside the touchesBegan method. However, this only removes the keyboard for a normal touch, not when the view is simply scrolled. So, what's the best way to remove the keyboard inside a UIScrollView? Thanks in advance for your help.

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  • How to manage css of big websites within team environment without mess?

    - by jitendra
    Where multiple people can work on same css. is it possible to follow semantic name rules even in large websites. If I would write all main css first time with semantic names . then what and how i should guideline/instruction to other developer to maintain css readability, validation . and to know quickly where other are adding their own css if required. Right now every one just go to down and write required css classes ot IDs at bottom. and most of the time they don't write semantic names.

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  • Why does a non-constant offsetof expression work?

    - by Chris J. Kiick
    Why does this work: #include <sys/types.h> #include <stdio.h> #include <stddef.h> typedef struct x { int a; int b[128]; } x_t; int function(int i) { size_t a; a = offsetof(x_t, b[i]); return a; } int main(int argc, char **argv) { printf("%d\n", function(atoi(argv[1]))); } If I remember the definition of offsetof correctly, it's a compile time construct. Using 'i' as the array index results in a non-constant expression. I don't understand how the compiler can evaluate the expression at compile time. Why isn't this flagged as an error?

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  • Difference between jQuery click, bind, live, delegate & trigger functions( with example)

    - by I Like PHP
    Hello All, I know there are a lot of questions similar to this, but I want to know clear difference between all of these jQuery functions together on this page with an example, so that it will be very helpful for me to understand the mechanism of all of these functions. I have also read the reference on jQuery main site, but there is no comparison between these: $().click(fn) $().bind('click',fn) $().live('click',fn) $().delegate('td','click',fn) $().trigger('click') // UPDATED Please do not refer any link if there is a part of question belong to that. Please describe how all four function exactly works in different manner, and which should be preferred in which situation. Note: If there are any other function with same functionality/mechanism , then please share. Thanks a lot. Update i have also seen $(trigger) function? is this works similar to above four function ?

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  • Segfaults with singletons

    - by Ockonal
    Hello, I have such code: // Non singleton class MyLogManager { void write(message) {Ogre::LogManager::getSingletonPtr()->logMessage(message);} } class Utils : public singleton<Utils> { MyLogManager *handle; MyLogManager& getHandle { return *handle; } }; namespace someNamespace { MyLogManager &Log() { return Utils::get_mutable_instance().getHandle(); } } int main() { someNamespace::Log().write("Starting game initializating..."); } In this code I'm using boost's singleton (from serialization) and calling Ogre's log manager (it's singleton-type too). The program fails at any trying to do something with Ogre::LogManager::getSingletonPtr() object with code User program stopped by signal (SIGSEGV) I checked that getSingletonPtr() returns address 0x000 But using code Utils::get_mutable_instance().getHandle().write("foo") works good in another part of program. What's wrong could be there with calling singletons?

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  • C++ rvalue temporaries in template

    - by aaa
    hello. Can you please explain me the difference between mechanism of the following: int function(); template<class T> void function2(T&); void main() { function2(function()); // compiler error, instantiated as int & const int& v = function(); function2(v); // okay, instantiated as const int& } is my reasoning correct with respect to instantiation? why is not first instantiated as const T&? Thank you

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  • Maintain Constant Title Across Website

    - by Jason
    If I am creating a website in ASP.NET, is it possible to programmatically set the title of the page be some predefined value with some extra information tacked on? For example: Home Page Title = Site Name Links Title = Site Name: Links Stuff Title = Site Name: Stuff Basically, whatever I defined as the main title on the page I'm currently on, I want to tack ": Name" onto the end of the title so it stays consistent across the website. I was thinking of defining it as a ContentPlaceHolder and wrapping some logic around it, but it doesn't appear to work how I thought it would (AKA, not at all).

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  • ID cannot be null (Auto Increment)

    - by THeK
    I'm using an INSERT ON DUPLICATE KEY statement for my website. It's for creating news items, so I figured I could use the same MySQL command for both creating and updating news items. However, when I use the following: INSERT INTO table (id,title,content) VALUES(NULL,"Test","Test"); Instead of creating a new auto increment value it throws an error. However, the command works on my main development server. But not on my laptop. Both versions of MySQL are the same, the only difference being MySQL was installed manually on my server, and with WAMP on my laptop. Are there any MySQL Variables that could be causing this?

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  • Making application menus on top of gnome shell

    - by GAP
    Is there a way to put gnome shell components (panel, message tray) to be appear below the popup menu's of other applications such as Java and Gtk Apps. The problem is when there are gtk apps which has tray icons the popup menu tends to appear below the message tray, this was bit ok now in 3.6 because the message tray hides soon as the icon is clicked. But the top bar is still a problem for large menus. When running eclipse with lot of options in the context menu the top most items including the scroll button are under top bar. Is there any thing i can change in the main.js or panel.js to get things below the popup menus ?

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  • Eclipse does not recognize the file ID

    - by user1833845
    I'm trying to create a button in the application from one activity to another. The document resource/values/strings.xml created for this ID: <string name="button1name"> CID </ string> But the document GurovPictures.java (this is my main activity) when I insert a line: Button but1 = (Button) findViewById (R.id.button1); This "button1" does not become blue like "editText1". Do you happen to know how to fix it? Just the internet no entries found.

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  • Can func get the lineno who call itself? (C/C++)

    - by kingkai
    Hi, I've a problem , as the following code discribe itself. 1 #include<stdlib.h> 2 #include<stdio.h> 3 void log() 4 { 5 printf("Log [Line:%d]\n",__LINE__); 6 } 7 int main() 8 { 9 log(); 10 log(); 11 } The expected result is Log [Line:9] Log [Line:10] But, the fact is Log [Line:5] Log [Line:5] No surprising, LINE has been substituted at the pre-process stage as 5. My Question is, how to design the log function to get the expected result? Thanks!

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  • Checking for an "end of line" in a C-string

    - by Numerator
    I would really love your help with the following problem: I want to get as an input from the user a maximum length of 30 chars string and check whether it contains an end of line. This is what I tried to write so far: int main(void) { int i; char* command = (char*)calloc(31, sizeof(char)); while (0 < 1) { scanf("%s", command); for (i = 0; i <= strlen(command); ++i) { if (command[i] == '\n') printf("here"); } if (strcmp(command, "quit") == 0) break; } The idea is to check whether the command given by the user as input is "legal" - that is of length < 31. when i run this code, it never prints "here" regardless of the length of input.

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  • SQL to get rows (not groups) that match an aggregate

    - by xulochavez
    Given table USER (name, city, age), what's the best way to get the user details of oldest user per city? I have seen the following example SQL used in Oracle which I think it works select name, city, age from USER, (select city as maxCity, max(age) as maxAge from USER group by city) where city=maxCity and age=maxAge So in essence: use a nested query to select the grouping key and aggregate for it, then use it as another table in the main query and join with the grouping key and the aggregate value for each key. Is this the standard SQL way of doing it? Is it any quicker than using a temporary table, or is in fact using a temporary table interanlly anyway?

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