C++ class definition with a member of the same class
Hi, i have a question about C++. Is it possible to declare a class with a member ot the same class? For example, a linked list or i want to convert this C code to C++ class (Elemento)
Hello,
i am using the sigaction function to handle the SIGCHLD signal.Is it possible to use a class member function as the handler function (the sa_handler member of the sigaction structure)?
The function's signature is:
void (*sa_handler)(int);so i don't think i can use a static member function... (2 Replies)
im just trying to have some fun and kill some time writing a c++ program that has a person type in a car make and model then gives them a year and a price. or something like that. i always have problems getting it goin but once the ball is rolling im usually pretty good. anyone wanna help me out? ... (1 Reply)
I have the following class and thought that when I call the set command to set a member, I always use value. Would that be fine?
class ModMisfit {
protected:
Real dtau;
Real mdacc;
Real mindist;
bool hw;
Source** src;
public:
void ... (7 Replies)
Hi,
I believe the next code is wrong:
class Egg {
Egg e;
int i;
Egg(int ii=0) : i(ii) {}
};
because you would end up with an endless definition (memory allocation) of Egg objects, thus int i.
Ok, so God Eckel proposes for a singleton:
class Egg {
static Egg e;
int... (5 Replies)
Hi all!
I am trying to register a device in an existing device class, but I am
having trouble getting the pointer to an existing class.
I can create a class in a module, get the pointer to it and then use
it to register the device with:
*cl = class_create(THIS_MODULE, className);... (0 Replies)
I have the two class definition as follows.
class A { public: int a; };
class B : virtual public A{ };
The size of class A is shown as 4, and size of class B is shown as 16. Why is this effect ?. (2 Replies)
There is base class B, and two derived classes D1 and D2 derived from Base. Base class B, have two data members ( public or protected or private or if any). D1 should inherit both these data members, and D2 should be deriving only one member from Base class. Is this kind of design possible without... (1 Reply)
Hello All,
I am a learner in C++. I was testing my inheritance knowledge with following piece of code.
#include <iostream>
using namespace std;
class base
{
public :
void display()
{
cout << "In base display()" << endl;
}
void display(int k)
{... (2 Replies)
Discussion started by: anand.shah
2 Replies
LEARN ABOUT DEBIAN
form_element
form_element(7rheolef) rheolef-6.1 form_element(7rheolef)NAME
form_element - bilinear form on a single element
SYNOPSYS
The form_element class defines functions that compute a bilinear form defined between two polynomial basis on a single geometrical element.
This bilinear form is represented by a matrix.
The bilinear form is designated by a string, e.g. "mass", "grad_grad", ... indicating the form. The form depends also of the geometrical
element: triangle, square, tetrahedron (see geo_element(2)).
IMPLEMENTATION NOTE
The form_element class is managed by (see smart_pointer(2)). This class uses a pointer on a pure virtual class form_element_rep while the
effective code refers to the specific concrete derived classes: mass, grad_grad, etc.
IMPLEMENTATION
template <class T, class M>
class form_element : public smart_pointer<form_element_rep<T,M> > {
public:
// typedefs:
typedef form_element_rep<T,M> rep;
typedef smart_pointer<rep> base;
typedef typename rep::size_type size_type;
typedef typename rep::vertex_type vertex_type;
typedef typename rep::space_type space_type;
typedef typename rep::geo_type geo_type;
typedef typename rep::coordinate_type coordinate_type;
// constructors:
form_element ();
form_element (
std::string name,
const space_type& X,
const space_type& Y,
const geo_type& omega,
const quadrature_option_type& qopt);
// accessors & modifier:
void operator() (const geo_element& K, ublas::matrix<T>& m) const;
virtual bool is_symmetric () const;
// for scalar-weighted forms:
void set_weight (const field_basic<T,M>& wh) const;
bool is_weighted() const;
const field_basic<T,M>& get_weight () const;
// for banded level set method:
bool is_on_band() const;
const band_basic<T,M>& get_band() const;
void set_band (const band_basic<T,M>& bh) const;
};
SEE ALSO geo_element(2), smart_pointer(2)rheolef-6.1 rheolef-6.1 form_element(7rheolef)