C++ :: Object Creation On Stack In Loop?
Apr 29, 2014have a piece of code
for (int i = 0; i<5; i++)
{
CMyStackObject sobj;
//
...
}
Does standard guarantees that instances of sobj will be different for different i?
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C++ :: Static Member Allocation - Global Object Creation
Jan 24, 2014I see many time where static data member is used to count creations of objects -
i.e.
1. the static data member is init to 0
2. the static data member is incremented by 1, in the Class' constructor, every time an object is created
However, if you define a global object of a class,
How can you tell that the static data member is initialized BEFORE the constructor of the global object is called? (i.e. before the global object is created).
Because to my understanding, you do not know in advance the order of global objects' creation -
so the Global Object could be created BEFORE the static data member was created and initialized.
C++ :: Heap Object Created On The Stack Isn't Cleaned Up Properly
May 21, 2013Code:
m_vRenderObjects.push_back(new Objects(mOperatorMesh));
/// this is never called
~Objects(void) {
OutputDebugStringA("Cleanup Objects
");
if (StateMachine != NULL)
[Code] ....
This leads to ugly memory leaks.
C++ :: Recursion To Loop Using Stack
Oct 15, 2014I want to convert the following program into a non-recursive code using a stack and a loop:
void write(int n) {
if (n>0) {
write(n-1);
cout << n << " ";
write(n-1);
}
}
And here is the code I am using but that currently does not work, and I do not know why:
stack<int> S;
S.push(n);
while (not S.empty()) {
int k = S.top();
[Code] .....
How to simulate that recursion. I thought it was enough to push into the stack the equivalent recursive call.
C/C++ :: How To Loop Through A Stack And Printout Each Of Its Elements
Sep 14, 2014I have a program that consist of a postfix calculator for a class assigment, my program is basically done, however I am missing how to loop through the stack and print each element of it. My output is suppose to look something like this:
Token: 4+5 (my token would be the infix expression that the user inputs)
output:45+ (my output would be the postfix expression)
Stack(bottom to top) :empty + + empty (This is suppose to be the process of the stack, but I do not know how to get this values to print out)
and I already have the token and output part, however I do not know how could I get the stack values, in order to print them out.
My program is the following:
#include <sstream>
#include<iostream>
#include<cstring>
#include<iomanip>
#include <vector>
#include <math.h>
#include <windows.h>
using namespace std;
[code].....
how to proceed with printing the stack so that it looks like my example output?
C++ :: Dynamic Map Creation Or Array
Mar 4, 2014I need to create dynamic array or map. for example
CString *a1;
CString *a2;
CString *a3;
it minimized to using for loop.
for (int i=1;i<=3;i++) {
CString s="a"+"itoa(i)"
CString *s;
}
Something like this. its same as map concept.
C++ :: GUI Objects Creation / Deletion?
Mar 31, 2013I have a basic query regarding GUI Objects (Labels, Combo Boxes etc) creation and deletion in a Dialog Box / Window. If I have the following code:
void MyWindow::someFunction() {
Label* myLabel = new Label(this); // how is it different from just "new Label";
//some code using myLabel;
[Code]....
1. Will myLabel (the object, not the pointer) be visible to me in the nextFuntion?
2. Is it necessary to call delete for the objects that I created in someFunction or are they cleaned up automatically by the compiler?
I am using Qt Creater as the IDE.
C++ :: Class Creation And Storing Angles
Dec 22, 2013I have a quick question. I need a way to represent orientation in degrees. I made a class which automatically changes negative angles into positive ones (adds 360 until >0) and makes sure they are under 360 (subtracts 360 until <360).
Now I realized I also need a class to represent angular movement, which must be in the range ]-360;360[
I don't think custom types with the unsigned keyword is a thing, but I'm just looking for a better way to do this then making two classes. Or would you just create a class which inherits from angle and overloads a few methods?
Or I could just use floats to represent rotation, because testing if an object does more than 1 turn per second isn't really required.
C :: Segmentation Fault And Core Dump Creation
May 19, 2013I'va got a segmentation problem with creation of core dump for the following snippet of c code:
Code:
#include
#include
#include
"lezione.h" studente s1, s2; studenti s;
int main()
{ int codice; char* nome; char* cognome; int esami;
printf("Leggi uno studente da tastiera e memorizzalo in una struct
");
lettura_studente(s1, codice, nome, cognome, esami); return 0;
}
[code]....
In conclusion I'va two problems:
1) Program crash;
2) I can't read struct studente within parameter function. What are the problems?
C++ :: Will Copy Constructor Does Object Initialization Using Another Already Created Object
Mar 16, 2013will copy constructor does object initialization using another already created object? I understand that it can be applied for object initialization and not for assignment.Is it correct?
View 10 Replies View RelatedC# :: Method Is Overwriting Both Instance Of Object And Original Object
Jul 3, 2014I have a method to take a Tile object and make an instances of it based on some data from the original object. Than it is suppose to manipulate the a specific instance and save the results. The first loop through it works but it changes all instance as well as the base.
public static int recurse(int count, Tile[,] b,Huristic h,int check) {
if (check==1) {
boardState.Add(B)/>;
return check;
} if (check == 0)
[Code] .....
C++ :: Importance Of Static Object In A Class And How They Are Different From General Object
Dec 13, 2012#include "B.h"
class A {
public :
A()
{
s_b = new B();
b = new B();
[Code] ....
In my project i have seen static object as above . But not able to know what is the exact use of it and how they are different from general object .
C++ :: What Can't Non-const Object Receive Temporary Object
Sep 11, 2014a function returns a temporary object like
int myfun(){
int x = 0;
return x;
}
this function will return a temporary integer now void fun1(const int & num); this function can receive from myfun().BUT void fun2(int & num); this function cannot receive from myfun() Why is that, Moreover what is lifetime of a temporary object like one returned in myfun() ???
C# :: Constructor Object Reference Not To Set Instance Of Object
Mar 28, 2014I am trying to use web api in order to return custom json response keys. For this i have return a custom class to return json response
Custom Class:
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
[Code].....
C Sharp :: Object Reference Not Set To Instance Of Object?
May 4, 2013I have a combobox with Items 1024
2048
4096
8192
String cach = form.comboCache.SelectedItem.ToString();
I am using the above code to retrive an item selected by user,But this line is giving an exception "Null Reference Exception, Object reference not set to an instance of an object"
C++ :: Dynamic Creation Of Arrays Of Pointers To Arrays Of Pointers
Apr 15, 2013I'm trying to write a function that takes a 32bit address and a data to store at this address.
I'm wanting to take the 32 bit memory address eg 0x12345678 and split it
into 4 x 2 bytes
12, 34, 56, 78
then each of the 4 entries is at most a 256 entry array.eg
FF, FF, FF, FF
So in this example, 0x12 points to 0x34 in the second array, which points to 0x56 in the third array, which finally points to 0x78 in the last array. This last array holds the actual data.
After successfully doing 0x12345678, say I might get a read for 0x1234AABB. So, the first and second pointers already exist, but I then have to create and write to dynamically created arrays.
The arrays need to have all entries set to NULL so that i know whether to follow the pointers to overwrite a previously entered value or create new arrays and pointers.
It all looks good and simple in the pseudo code I've written up but I'm having trouble coding it. I'm currently trying to deal with the first entry case, ie all array elements are NULL, but I'm getting confused with the pointers and creation of new arrays.
void cpu::store(unsigned int mem_add,unsigned int mem_val) {
int first = (mem_address&4278190080)>>24;
int second = (mem_address&16711680)>>16;
int third = (mem_address&65280)>>8;
int fourth= (mem_address&255);
[Code] .....
A1 has been declared as
int* A1[256] ;
C# :: Object Reference Not Set To Instance Of Object?
Mar 28, 2014I am using session to pass object from controller to custom class in MVC Web API. here is my code, i am getting error at session.
public HttpResponseMessage Get()
{
var person = db.Persons.ToList();
[Code]....
C/C++ :: Get Reference To Text Object With The Name Of Object?
Aug 23, 2013In Visual Studio 2010 C++
I have a series of existing text objects
The text properties names are
item1_lbl,
item2_lbl,
item3_lbl,
….
Based on a selection I want to change an object. I generate the name of the object I want to change in a string so from this string is there a way to get a pointer to the correct text object that is same name?
C++ :: Starting Vertex Array Object At Index Of Vertex Buffer Object
Sep 22, 2014I'm trying to figure out how I can create a vertex array object at offset of a vertex buffer object.I've created the buffer object. I'd like the "texs" idnex data to start at the texture coordinate content of the vertex_t structure.
Type definitions:
struct vertex_t {
vector3d_t position;
float s; // Texture coordinate s
float t; // Texture coordinate t
};
Code so far:
// How do I make this start at a certain spot of the VBO?!
glVertexAttribPointer(texs, 2, GL_FLOAT, GL_FALSE, sizeof(vector3d_t), nullptr;
//...
C :: Loop Does Not Work And Program Quits Without Displaying For Loop Function
Oct 13, 2014We are making a program--but every time we input a value for scanf, the following for loop does not work and the program quits without displaying the for loop's function. We are not getting any errors.
View 11 Replies View RelatedC++ :: Can Declare Stack Globally?
Jul 14, 2013Can you declare a stack globally?
Code:
stack< int > stk;
C++ :: How To Check What Causes A Stack Overflow
Sep 22, 2013I'm getting a stack overflow error because for large numbers, this code I'm working on allocates too much on the stack.
Is there a way of tracking stack allocations specifically?
Will multithreading solve my problem if each thread is doing the static allocations?
Would I really have to use malloc or new every time I wanted to use memory just to make my code scale to huge numbers?
C :: Bit Checking - Stack Overflow
Sep 19, 2013I usually check if a bit is set using:
Code: bit = (number >> n) & 1; where `n` is the bit I want to check...
But I came across a stackoverflow answer saying:
bit = number & (1 << x); will not put the value of bit x into bit unless bit has type _Bool (<stdbool.h>).
Otherwise, bit = !!(number & (1 << x)); will..
So why is this? why the double !?
C :: Corrupted Variable Stack?
Jan 7, 2014I am getting corrupted stack variable for this piece of bolded code. (starCounter is corrupted)...
Code:
int i;
int j;
int s;
double starCounter[18]= {0};
double lowestfreq = 0;
double frequencyChecker [18] = {0};
[Code] .....
C :: Trying To Make A Stack Through Malloc
Oct 27, 2013I am curious as to what is happening to my pointers and everything once I call malloc to create space for 5 integers to try to make a stack.
Code:
#include <stdio.h>
#include <stdlib.h>
void add(int * TOP, int * stack);
int main() {
int *stack = NULL;
int *TOP = NULL;
stack = (int *)malloc (5 * sizeof(int));
[Code] ....
I am guessing that when I initialize stack to malloc, stack now stores the starting address of where the space is taken out, and also assigns TOP that address too. I get the choice from the user (b) to get the instruction to try to push on the stack. I was told that the if statement in the function checks if the stack has passed the bounds of 5 elements. If not, it assigns the scanned variable and puts it into what TOP is pointing to and increments TOP to the next address. It is not working and am wanting to see where my logic is wrong.
C :: Stack Implementation Using Arrays
May 31, 2014Code:
#include <stdio.h>#include <unistd.h>
#include <stdlib.h>
#define STACKSIZE 100
struct stackk
{
int top;
int items[STACKSIZE];
};
typedef struct stackk *s;
[Code]...