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wilintec · Apr 13 '12, 09:43 PM

Hello, my question is this.
In C++, how do i call a method member of class A from a class B, using a pointer.
By the way Class A and B are of different types.

I read that when a pointer is pointing to member function it can only point member functions within the class. But how can i point to a member function outside the class.?????

for example

class A...

giacomomarciani · Jan 11 '12, 09:32 AM

I don't understand why the piece of code below returns me the error:

warning: format ‘%X’ expects argument of type ‘unsigned int’, but argument 3 has type ‘int *’ [-Wformat]

Code:

    int *v=malloc(10*sizeof(int));
    int i;
    for(i=0;i<10;i++) v[i]=i;
    for(i=0;i<10;i++) printf("v[i]=%+2d &v[i]=%#.10X | 
    *  (v+i)=%+2d (v+i)=%#.10X\n",v[i],&v[i],*(v+i),(v+i));

KENNY LIU · Oct 17 '11, 06:43 AM

My class

Code:


#ifndef NODE_H
#define NODE_H

#include <cstdlib> // Provides size_t and NULL

class Node
{
public:

// TYPEDEF
typedef int value_type;

// CONSTRUCTOR
Node(const value_type& init_data = value_type(), Node* init_link = NULL)
{
data_field = init_data; 
link_field = init_link;

...

Erjan · Jun 25 '11, 12:51 AM

i m trying to solve a textbook problem
to delete a node using one pointer
my code looks like this:

Code:

#include <stdio.h>
#include <stdlib.h>
struct node{
   int first ;
   struct node *next ;
} ;

struct node *add_to_list(struct node *lst, int n){
   struct node *newnode ;
   newnode = malloc(sizeof(struct node)) ;
   if(newnode == NULL){

...

Bharathi Kanama · Mar 20 '11, 09:55 AM

Hi,

I am using pointers to generate a network of paths for a simulation run.

I am getting "stack overflow" error, when the network reaches larger sizes.

the program currently uses recursion, which is unavoidable in this case.

Is there a way I trouble shoot this error, either by release of temp data structures called in subroutines or by increasing the stack size for this project....

jon williams · Feb 23 '11, 02:40 AM

Im trying to to create a simple 4 function calculator using a jump table without switch case or if/else statements. I understand I can create the jump table via function pointers but I am kindda blanking out. I've started with the addition and subtraction part of the program but am trying to grasp the design/strategy to use. I am also getting an error when putting the method in the array, so far this is what i have:....I'm also trying to figure out...

DopeyinIdaho · Nov 23 '10, 06:19 AM

We have a lot of legacy code written in C/C++ that maintains data in shared memory structures. In the C/C++ implementations , for a lot of functions, we get a pointer to the shared memory address then cast that pointer to the type of structure that is contained in that shared memory.

I have a need to "port" the same interface to C#. The requirements are that we cannot change any of the C/C++ implementation and the interfaces...

phoenix1990 · Sep 12 '10, 08:01 AM

So i've been working on a program in c++ that uses classes, and i am having a few problems with returning a class value from another class's function.

So i have a class called X, which is essentially a class that defines a linked list, and has some of the basic operations. In that class i have a '[]' operator that is overloaded with each value in the linked list. The operator can also override values in the linked list using
...

tyagithehacker · Jul 4 '10, 09:53 AM

Me and 1 of my friend were arguing, over the nature of address stored by pointers in c language.

He was saying that its logical address, while i thought he is wrong. can anyone plz tell me who is right, he or me, plz give the reasion for the same.

thanx in advance.

EARNEST · Mar 30 '10, 05:17 PM

Code:

#include <string.h>
#include <ncurses.h>
#include <time.h>
#include <stdlib.h>

typedef struct builder{
	int locX;
	int locY;
	char charValue_H;
	char charValue_T;
	char *charArray_B;
} sbuilder;

void drawborders();
void initialize(sbuilder *stopass);
bool collisiondetection();

int main()
{

...

JSchaenzle · Sep 11 '09, 01:37 PM

I am trying to pass a string to a Mid() function, return a portion of the string, and then convert that portion to an int. My attempt looks like this..

char * ReceivedStr;
char * Mid(char * inString, int Start, int Length );

main()
{
int i;
int dis;
char * Distance;
ReceivedStr = "Move125";

Distance = Mid(ReceivedStr , 4, 3);...

yfredmann · May 24 '09, 07:54 PM

Hi dear friends,

This problem might be so popular to some of you, but I couldn't be able to do it myself.

The problem: How to delete a node from a single linked list using only one pointer?

Where the target node to be deleted has a key field, and based on a match, let us say at first a sequential search, this node has to be deleted.

What other ways that a singly linked list can be searched...

srbakshi · May 20 '09, 10:19 AM

Hi all,

I have the following scenario:

Code:

int main()
{
   char a[] = "Hello";
   printf("Modified string: %s\n", modify_str(a));
}

char *modify_str(char *b)
{
   /* Insert a  '+'  after every letter in the string */
   /* "Hello" becomes "H+e+l+l+o+" */
   return b;
}

Now my...

srbakshi · Apr 27 '09, 11:51 AM

Hi all! I have the following code:

Code:

typedef struct A
{
      char* string;
}A;

//Function prototype
void fill_up_A(A* a);

int main()
{
      A var_A;
      fill_up_A( &var_A);
      printf("String is : %s", var_A.string);
      return 1;
}

//Function definition
void fill_up_A(A* a)
{

...

JonathanS · Dec 2 '08, 05:31 AM

I have a program in which I am trying to create a chain of (unspecified number) nodes. I want to be able to use a loop to create a new node and then link it in. I've tried it (and I think it works) to put the new within the loop and just have the compiler allocate a new version of the variable using the same name.

E.g.,

Code:

 for (      )
                     Node * anode = new Node();

This doesn't seem to be...

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