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• Why the function from immediate parent is called and not from grandparent class. Is this called func

  - by sandeep

  class A { public: void test () { cout<<"In A"; } }; class B :public A { public: void test () { cout<<"In B"; } }; class C : public B { public: int c; }; int main() { C c; c.test(); } The result is: In B...

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• C/C++ variable length automatic array performance

  - by aaa

  hello. Is there significant cpu/memory overhead associated with using automatic arrays with g++/Intel on 64-bit x86 linux platform? int function(int N) { double array[N]; overhead compared to allocating array before hand (assuming function is called multiple times) overhead compared to using new overhead compared to using malloc range of N maybe from 1kb to 16kb roughly, stack overrun is not a problem Thank you

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• Please suggest what is wrong with this string reversal fucntion(C++)?

  - by AKS

  This code is compiling clean. But when I run this, it gives exception "Access violation writing location" at line 9. void reverse(char *word) { int len = strlen(word); len = len-1; char * temp= word; int i =0; while (len >=0) { word[i] = temp[len-1]; //line9 ++i;--len; } word[i] = '\0'; }

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• invalid conversion from ‘char*’ to ‘char’

  - by paultop6

  Hi Guys, I have a, int main (int argc, char *argv[]) and one of the arguements im passing in is a char. It gives the error message in the title when i go to compile How would i go about fixing this? Regards Paul

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• Writting a getter for a pointer to a function .

  - by nomemory

  I have the following problem: "list.c" struct nmlist_element_s { void *data; struct nmlist_element_s *next; }; struct nmlist_s { nmlist_element *head; nmlist_element *tail; unsigned int size; void (*destructor)(void *data); int (*match)(const void *e1, const void *e2); }; /*** Other code ***/ What will be the signature for a function that returns 'destructor' ?

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• What's the catch to create _names _of _fields _like _these in java?

  - by Roman

  From time to time I see something like this: class Clazz { private int _goodName; private int _anotherGoodName; ... } I don't get it. It's hard and unusual to read such code. What are the pros?

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• Locating objects (structs) in memory - how to?

  - by flavour404

  Hi, How would you locate an object in memory, lets say that you have a struct defined as: struct POINT { int x; int y; }; How would I scan the memory region of my app to find instances of this struct so that I can read them out? Thanks R.

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• NZEC in spoj FACKT

  - by frodo

  I was trying to solve this problem http://www.spoj.pl/problems/FACKT/, and I keep getting a Non-Zero Exit Code (NZEC). How exactly do I figure out what to change in the code to overcome this? Here is the code import math import sys def cal_num(n): i = 1 f = 1 while f<n: f *= i i = i + 1 return i-1 while 1: line = sys.stdin.readline() if line == "": break n = int(line) x = cal_num(n) y = math.factorial(2*x) l = int(math.ceil(math.log(y,10))) print (x,l) Any suggestion would be welcome.

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• Postion of & to denote reference type

  - by Matt H

  I was wondering whether to put the ampersand (&) after the variable type or before the variable name. To put it simply, I want to know which one is the conventional style or the standard, or if it is entirely down to preference. int &x; or int& x;

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• How generate unique Integers based on GUIDs

  - by anonim.developer

  Is it possible to generate (highly probable) unique Integer from GUIDs? int i = Guid.NewGuid().GetHashCode(); int j = BitConverter.ToInt32(Guid.NewGuid().ToByteArray(), 0); Which one is better?

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• Deprecate in Java 1.6

  - by iano

  In Java 1.5, to deprecate a method you would: @Deprecated int foo(int bar) { } Compiling this in Java 1.6 results in the following: Syntax error, annotations are only available if source level is 1.5 Any ideas?

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• haskell check for user input errors

  - by snorlaks

  Hello. Im writing app in haskell and I would like to know that is the best way to check if users input is ok for example is it int when Im asking for int or if its date when asking for well formed date ? Thanks for help

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• What does a fullstop or period or dot (.) mean in Haskell?

  - by Casebash

  I really wish that Google was better at searching for syntax: decades :: (RealFrac a) => a -> a -> [a] -> Array Int Int decades a b = hist (0,9) . map decade where decade x = floor ((x - a) * s) s = 10 / (b - a)

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• how use in it in main project?

  - by davit-datuashvili

  I have the following interface: public interface MyFunctor { int myFunction(int x); } And I created a class which implements this interface : public class Myfunction1 implements MyFunctor { } how use in main project? i have corrected mistake now i need how run it in main project? i mean in public static void main(String[]args)?

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• Comparing One Value To A Whole Array? (C#)

  - by Soo

  Let's say I have a C# variable and array: int variable_1 = 1; int[3] array_1 = {1,2,3}; How can I check if the value of variable_1 is equal to any of the values in array_1 without looping through array_1?

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• Haskell - how can I check if number is Double/Float?

  - by MMM

  I would like to do smth like: x `mod` 1.0 == 0 // => int but it seems mod works only for int... help!

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• Output of a C question..

  - by RBA

  int main() { int a=10,b=20; char x=1,y=0; if(a,b,x,y) { printf("EXAM"); } } Hi, Please let me know why output of this question is "Printed Nothing".. Thankss.

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• Access element of pointed std::vector

  - by user146780

  I have a function where I provide a pointer to a std::vector. I want to make x = to vector[element] but i'm getting compiler errors. I'm doing: void Function(std::vector<int> *input) { int a; a = *input[0]; } What is the right way to do this? Thanks

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• How are macros evaluated in C?

  - by httpinterpret

  #ifdef CONFIG_IP_MULTIPLE_TABLES struct fib_table * fib_hash_init(int id) #else struct fib_table * _ _init fib_hash_init(int id) { ... } How's the value of CONFIG_IP_MULTIPLE_TABLES populated?

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• How to check if a variable is an object?

  - by Patrick

  Is there any way to do the following at compile-time? int anInteger = 0; __if_object(anInteger) { // send object some messages } __if_primitive(anInteger) { // do something else } An dummy situation where this could be used is to define the __add_macro below. #define __add_macro(var, val) __something_goes_here__ int i = 1; MyInteger* num = [[MyNumber alloc] initWithValue:1] __add_macro(i, 4); __add_macro(num, 4); // both should now hold 5 Thanks

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• Why does n++ execute faster than n=n+1 ? [closed]

  - by gcc

  In C language, Why does n++ execute faster than n=n+1? (int n=...; n++;) (int n=...; n=n+1;) Our instructor asked that question in today's class. (this is not homework)

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• find out the origin of function calls

  - by user560343

  Hi all, I wonder if there is a software that can help us determine all possible origins of a function call. For example: /* in file f1.c */ int f1() { x_func(); } /* in file f2.c */ int f2() { x_func(); } If we want to trace the origin of all function calls to x_func(), the output will be: f1.c:f1() f2.c:f2() This is very useful when reading the source code. All answers are appreciated. Thank in advance :D

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• startsWith using error in java

  - by user1838839

  defined variable: LinkedList list1=new LinkedList(); Object get() in list1 obtains a node of list1 Object remove() in list1 deletes a node of list1 count() is length of list1 for(int i=1;i<list1.count();i++){ if(list1.get(i).startsWith('"',0)) //Error here list1.remove(i); } Error: cannot find symbol symbol: method charAt(int) location: class Object how to fix this problem? I would like to delete the node in list1 which starts with (").

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• what is means of this code in c#

  - by Richa Media and services

  are you know what is means of this code int x = 45; int y = x &= 34; it give me that y = 32

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• Array help in C++

  - by user267237

  I am writing a program that is declaring an array of 100 integer numbers and filling the array with random numbers using rand(). All I have so far is: #include <iostream> using namespace std; int main() { int random_integer = rand();

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