C/C++ :: How To Take Address Of Member Function
Oct 23, 2013I want to take address of a member function in c++. How to do this.
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C++ :: Containers That Doesn't Change Member Address
Jun 25, 2013#include <iostream>
#include <vector>
using namespace std;
int main() {
int * ptr;
vector<int> data;
data.resize( 1000 );
[Code] ....
So I need container that doesn't rellocate their address, It doesn't need to be like vector that everything is in a single pointer such as
int * a = new int[2000];
I have a pointer pointing to a member of a container and it needs to remain valid... doing
vector<int *> Array;
// allocating
for( int i = 0; i < 1000; ++ i ){
Code] ...
Waste of time, allocating them and deallocate them seem to take some time too
a List is also not efficient enough because I access them based on index
It is not a int it is pointing to but a texture, for the sake of simpler example I pick int
So is there a container that doesn't change member address and allocate when it needs to expand ?
C++ :: How To Get Relative Address Of Member Of Class Of Struct
Apr 2, 2014How to get relative memory address of members of Class or Structure ? I want to auto scan the members of Class/Struct, and show the address/value like the "watch window" in debug mode of popular C/C++ IDE software.
View 2 Replies View RelatedC++ :: Memory Address Of Class Member Variables?
Jun 22, 2013Suppose I have two classes, MyClassX and MyClassY, each with two member variables, as defined below. I create an object instance of each class, and then create a pointer to each member variable for each object:
Code:
class MyClassX
{
public:
int a;
double b;
MyClassX(int _a, double _b)
[code]....
After converting the hexadecimal to decimal, it appears that with MyClassX, pxb is 8 bytes from pxa, whereas for MyClassY, pya is only 4 bytes from pyb. This makes sense for MyClassY, because the first member variable to be stored is an int, and so will occupy 4 bytes. However, why should this be any different for MyClassX, which also has an int as the first member variable, so shouldn't this also occupy 4bytes?
The reason I have come across this problem is that I am looking into streaming objects to memory and then loading them again. (I know boost can do this, but I am trying it out myself from scratch.) Therefore, this is causing an issue, because I cannot just assume that the size of memory occupied by an object is just the sum of the sizes of its member variables. MyClassX is 8 bytes larger than MyClassY, even though the intuition is that it should only occupy 4 bytes more due to a double being replaced by an int.
Visual C++ :: Access Member Function From Non-member Function In Same CPP File?
Dec 16, 2012In my MFC, CMyPorpertyPageDlg is derived from CPropertyPage. How to access its member function from a nonmember function in the same CPP file?.
void Non_Member_Get_PorpertyPage()
{
CMyPorpertyPageDlg* pPageDlg = ....
}
C++ :: Call To Member Function X Is Ambiguous - Overloaded Member From Header File
Feb 23, 2014I get the following error in XCode whenever I try to access the member I created 'randomGen' in a separate class in a different header file. I have made sure to include the header file and have tried to access it through an object.
This is the code I enter when trying to access the method from randomiser.h in main.cpp. It is also an overloaded function with doubles and integers:
RandomG randomiser;
randomiser.randomGen(); // 'Call to member function 'randomGen' is ambiguous'
This is the code inside randomiser.h:
#include <string>
#include <iostream>
using std::string;
using std::cout;
using std::endl;
class RandomG {
[Code] ....
This is the error inside xcode: [URL] ....
I have tried seperating the code for the functions in another class (main.cpp) and then running and it seems to works, so I'm not sure why I can't put everything in the .h file and then access it?
I would like it in a seperate file so it doesn't clutter my main. I am writing a game with SDL so that might be confusing and I would like the window to have a random title and other random properties, so it would be easier to use a function.
C++ :: Call Member Function Inside Another Member Function?
Mar 21, 2013If I wanted to call a member function inside another member function, how would I do that, if it's possible?
For example, if I have Find(int key) defined already and wanted to call it while i was overloading operator+.
C++ :: Non Constant Member Function Being Called Inside Constant Member Function?
Dec 28, 2012#include <iostream>
class Hello {
public:
void Test() {
[Code].....
As i know a non-constant member function cant be called inside a constant member function but how the above code has been compiled successfully and giving the expected result .
C/C++ :: How To Hook Function From Same Process And Get Address Of Caller Function
Apr 27, 2013I need to do it to avoid calling a function of my process from injected code.
So would like to hook this function to check whether the call is from the current module or it is from an external module, then I compare the address of the instruction who did the call with the module address range.
C/C++ :: Function To Return Either Value Or Address Of That Value?
Feb 1, 2015I'd like a function to return either a value or the address of that value by the users input. So he can call the function like:
function("adress") - gets an adress, or function("value") - gets the value
I've tried both function overloading and templates, but none of them worked. He might input a character for the address and an int for the value... but...
Another strange thing that i observed is that the value returned by the function below is 0, so the output is address 0.
class testing
{
public:
static int x;
[Code].....
C/C++ :: Find The Address Of Function?
Oct 14, 2012find the address of function? mail the ans on (email removed)
View 4 Replies View RelatedC++ :: Why Return Values From A Function By Ref Address
Feb 5, 2014You can return values from functions by ref, address or value you can also do this with parameters, so what is the difference, if you have full return of a passed parameter by ref or address why would you need to ever return the function as a whole?
For ex
Code: int nValue(int& y){
y++;
}
or int& nVlaue(int y){
return y;
}
C :: How To Get Address Returned By Malloc Function
Dec 6, 2013So, I'm in the midst of implementing my own malloc() and free() functions, but I'm having a hard time with the syntax of getting the address that malloc returns. Whenever I check the address, it's 0 Here's the code:
Code:
char *word = malloc(10);
int address = *word;
printf("%d",address);
The reason I want the address is so that I could store it in a data structure for further usage when I'm dealing with different cases for the free() function. Or is there another way to do this?
C++ :: Pass Address Of Pointer To Function
Sep 25, 2014#include <iostream>
using namespace std;
void myfunc(int* ); // what do i put in these parameters to accept a mem loc of a pointer
int main () {
int x = 5;
[Code] .....
SOLUTION:
#include <iostream>
using namespace std;
//Purpose to create a function that returns a pointer to a pointer
int** myfunc(int**);
int main () {
int x = 5;
[Code] ....
C/C++ :: How To Find Address Of Library Function
Nov 30, 2012I want to find the address of printf() in c.
View 2 Replies View RelatedC++ :: Return Non-Dynamic Local Address Of Var From Function?
Nov 29, 2014Can I return a non-dynamic local address of a var from a function?
int* func(int m){
m=1;
return m;
}
My compiler giving warning but compiles and returns add but My tutor handout says it will not compile...!!! she used array in func and returned arr[m]
C++ :: Labels As Pointer - Passing Address To A Function
Mar 7, 2014Is there such thing as passing a winforms label by reference? For example, can I create a pointer label and pass the address to a function? I've looked online but couldn't find anything. Perhaps that's a sign?
View 1 Replies View RelatedC/C++ :: Statement Cannot Resolve Address Of Overloaded Function
Feb 11, 2015#include<iostream>
using namespace std;
#include<string>
main() {
cout<< "donner votre nom:";endl;
string nom("sans nom");
cin>> nom;endl;
cout<< "votre nom est:"<<nom; endl;
return 0;
}
when i try to build this program, i get this masseges:
in function 'int main()':
statement cannot resolve address of overloaded function
this a picture of the errors:
C++ :: Calling Function Address - Too Many Arguments For Call Error
Nov 25, 2014In C you can just load and call the address of a function without defining its arguments like this:
Code: int (__stdcall *pMessageBox)();
int main() {
HMODULE h=0;
h = LoadLibrary("user32.dll");
pMessageBox = GetProcAddress(h, "MessageBoxA");
// MessageBoxA
pMessageBox(0, "MessageBoxA has been called!", "MessageBox Example", MB_OK);
return 0;
}
In C++ the same code gives "too many arguments for call" error unless you define the function first with its parameters.
Is there a way to do it the same way in C++?
C++ :: Error - Statement Cannot Resolve Address Of Overloaded Function
Nov 2, 2013I can't seem to figure out whats causing this error: statement cannot resolve address of overloaded function . Error is before line 14 in bubblesortrand function. Thnx in advance.
void bubblesort(int num[], int a_size)
{
int i, j, temp;
for(i = (a_size - 1); i >= 0; i--)
[Code].....
C++ :: Pointer Passed Into A Function Looses Address It Points To
Mar 7, 2013Sem is a pointer to semantic which is a struct type variable. I pass the sem into function yylex so i can fill the semantic.i and semantic.s(s points to an array). The problem is that when sem->i = a; is used inside yylex function, sem->s stops showing to the array.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <iostream>
using namespace std;
union SEMANTIC_INFO
[Code] ...
C :: Simple Valid / Invalid Function - Determine Either A URL Address Is Correct Or Not
Jul 13, 2013I have to write a code which would determine either a URL address is correct or not.
Now, a valid address should look like: "www.something.something.uk".
It has to have 3 dots, 3 w-s in the beginning, and it must end with "uk".
E.g.
Valid addresses:
1. www.jce.ac.uk
2. www.tr2213.oi34.uk
Invalid addresses:
1. www2.jce.ac.uk
2. òæøéàìé - îëììä à÷ãîéú ìäðãñä éøåùìéí - ìéîåãé äðãñä ìúåàø øàùåï
3. www.something.uk
Just to be clear, this criteria mentioned above is not real, just homework
Code:
#include <iostream>
#include <string.h>
using namespace std;
int isValid (char s[])
{
int dots=0;
[Code] ......
It tells me both strings are incorrect but the first 1 is.
C++ :: For Each And Member Function
Apr 2, 2012I can't get this code to compile (using VS2010 and gcc4.6.1):
Code:
#include <string>
#include <vector>
#include <algorithm>
#include <boost/bind.hpp>
class X {
public:
void foo( const std::vector<std::string>& v ){
[Code] ....
VS2010 presents an error message like "member function already defined or declared" and gcc something like "... function can not be overloaded" (very cryptic error message).
If I change the vector to foo to std::vector<int> and let bar() take an int, it works perfectly fine. And if I use boost
Code:
std::for_each( v.begin(), v.end(), boost::bind( std::mem_fun(&X::bar), this, _1 ) );
The above code compiles as well.
While it is perfectly fine for me to use boost I would nevertheless like to understand what's happening here.
C++ :: Using Non-function Member Into A Class
Oct 21, 2013I mount a function (parameter - numeric vector; returns a string). However, this same function is used in several classes. To avoid that I keep duplicating the same code within these classes there is a way to do that as the code below?
std::string func( const vector<int> vec ) {
//processamento
return result;
} class A {
[Code] ....
C++ :: member Function Of Class
Jun 16, 2013whether i can define a member function inside a class or not in C++. Is the following code is legal?
#include<iostream> using namespace std;
class adder {
private:
int a;
int b;
int c;
int answer;
public:
[code]....
C++ :: Constant After Member Function
Aug 27, 2013#include<iostream>
using namespace std;
class Student{
public:
int age;
int rollNo,marks;
string name;
void AddEntry();
[Code] .....
error: non-member function 'void Display(Student*, int)' cannot have cv-qualifier|
why and how can I solve it?