Double link list with template

#ifndef __PS_DLL_H_
#define __PS_DLL_H_
#include <iostream>
using namespace std;

template <class T>
class DLL;

template <class T>
class Node{
  T _data;
  Node<T>* _prev;
  Node<T>* _next;
  Node(T data, Node<T>* prev=(Node<T>*)0, Node<T>* next=(Node<T>*)0);// just incase, review later
  friend class DLL<T>;
};

template <class T>
class DLL{
  Node<T>* _head;
  Node<T>* _curr;
  Node<T>* _tail;
  void copy(DLL<T>& D);
public:
  DLL();
  DLL(DLL<T>& D);
  virtual ~DLL();
  bool isEmpty();
  void append(T data);
  DLL<T>& operator=(DLL<T>& D);
  T remove();   // removes the current node and returns the data
  bool del();     // removes the current node returns false if is empty
  void insert(T data); // insterts before current
  bool goHead();
  bool goTail();
  bool goNext();
  bool goPrev();
  T visit();    // returns the current data
  int dept() const; // returns the number of Nodes
};

template <class T>
Node<T>::Node(T data, Node<T>* prev, Node<T>* next){
  _data = data;
  _prev = prev;
  _next = next;
}

template <class T>
DLL<T>::DLL(){
  _head = _tail = _curr = 0;
}

template <class T>
DLL<T>::~DLL(){
  while(del());
}

template <class T>
void DLL<T>::copy(DLL<T>& D){
  int curpos;
  for(curpos=0;D.goPrev();curpos++); // findout where is current
  if(!D.isEmpty()){
    do{
      this->append(D.visit());
    }while(D.goNext());
  }
  for(D.goHead(), this->goHead(); curpos; D.goNext(), this->goNext(),curpos--); 
}

template <class T>
DLL<T>::DLL(DLL<T>& D){
  _head = _tail = _curr = 0;
  this->copy(D);
}

template <class T>
DLL<T>& DLL<T>::operator=(DLL<T>& D){
  while(del());
  this->copy(D);
  return *this;
}

template <class T>
void DLL<T>::append(T data){
  Node<T>* newnode = new Node<T>(data);
  if(_tail){  // ! empty
    _tail->_next = newnode;
    newnode->_prev = _tail;
    _tail = _curr = newnode;
  }
  else{
    _tail = _curr = _head = newnode;
  }

}

template <class T>
T DLL<T>::remove(){
  T data = visit();
  del();
  return data;
}

template <class T>
bool DLL<T>::del(){
  bool ok = false;
  if(_curr){
    ok = true;
    Node<T>* todel = _curr;
    (_curr->_next) ? _curr->_next->_prev = _curr->_prev : _tail = _tail->_prev;
    (_curr->_prev) ? _curr->_prev->_next = _curr->_next : _head = _head->_next;
    (_curr->_next) ? _curr = _curr->_next : _curr = _curr->_prev;
    delete todel;
  }
  return ok;
}

template <class T>
void DLL<T>::insert(T data){
    Node<T>* toInsert = new Node<T>(data);
    (_curr->_prev) ? (_curr->_prev->_next = toInsert) : (_head = toInsert);
    toInsert->_prev = _curr->_prev;
    toInsert->_next = _curr;
    _curr->_prev = toInsert; 
    _curr = toInsert;
     
}

template <class T>
T DLL<T>::visit(){               // retruns data of current
    return _curr->_data;
}

template <class T>
bool DLL<T>::goHead(){
    return ((_head) && (_curr = _head)) ? true : false;
}

template <class T>
bool DLL<T>::goTail(){
    return ((_tail) && (_curr = _tail)) ? true : false;
}

template <class T>
bool DLL<T>::goNext(){
    return ((_curr->_next) && (_curr = _curr->_next)) ? true : false;
}

template <class T>
bool DLL<T>::goPrev(){
    return ((_curr->_prev) && (_curr = _curr->_prev)) ? true : false;
}

template <class T>
bool DLL<T>::isEmpty(){
    return !_curr;
}

template <class T>
void printList(DLL<T>& d){
    d.goHead();
}

template <class T>
ostream& operator<<(ostream& os, DLL<T>& d){
  int cur;
  bool done = false;
  for(cur=0;d.goPrev();cur++); // findout where is current
  do{
    os<<d.visit();
    done = !d.goNext();
    if(!done){
      os<<", ";
    }
  }while(!done);
  for(d.goHead();cur;d.goNext(), cur--); // set current to what it was before
  return os;
}

template <class T>
ostream& operator>>(ostream& os, DLL<T>& d){ // printing in reverse!!!!!
  int cur;
  bool done = false;
  for(cur=0;d.goNext();cur++); // findout where is current
  do{
    os<<d.visit();
    done = !d.goPrev();
    if(!done){
      os<<", ";
    }
  }while(!done);
  for(d.goTail();cur;d.goPrev(), cur--); // set current to what it was before
  return os;
}
#endif


#include "dll.h"

int main(){
  DLL<int> d;
  for(int i=0;i<10;i++){
    d.append(i+1);
  }
  cout<<d<<endl;
  d.goHead();
  d.insert(1000);
  d.goNext();
  d.insert(2000);
  cout<<d<<endl;
  cout>>d<<endl;
  cout<<d.remove()<<endl;
  cout<<d<<endl;
  return 0;
}

Problem in project .exe file

Everything is working perfectly but do not know this project.exe is giving me error. I tried to build new projects but still having same problem. Such a crazy headache......... :(

CDirection issue Solved

Hi friends
                 Sorry for CDirection issue. I did something wrong. Actually I forgot to use namespace. That's why I was getting error. Anyways it is solved.

Thank you
Pankaj Sama

Getting CDirection Error

Hi friends
                I am doing my CMenuItem. I updated the cuigh.h as on wiki page but I am getting an error "Cdirection is not defined" in Cframe.h. But it is prototype in cuigh.h as
"enum CDirection {centre, left, right, up, down};

Can somebody help me with that. Looking forward for reply

Thanks
Pankaj Sama

Convert Bits value of a variable(any type) to Hex

Program is written in the purpose of Converting Bits value of a variable to Hex

#include <iostream>

using namespace std;

void bitDump(void* address, unsigned int size);

int main(){
  long double ld = 12345.123456;
  bitDump(&ld, sizeof(ld)); // print the bit pattern (cool if formatted)
  return 0;
}
//Loop through size and convert each char to 8 binary digits.
void bitDump(void* var, unsigned int size){
    char* addres = (char*) var;
    int count = 1;
    for(int i = 0; i < sizeof(size); i++){
        unsigned int mask = 1 << 7;
        while(m){//convert each char to 8 binary digits
            printf("%d", !!(addres[i] & mask));
            m = m >> 1;
           
            if(count == 4)
            {
                putchar(' ');
                cnt = 1;
            }
            else
            {
                count++;
            }
    }
    putchar('\n');
}

BitPrint Function

Function to Print the Bits of a variable.....

void prnBits(unsigned int val)
 {
    unsigned int m = 1 << sizeof(val)*8 - 1;
   
    while(m)
    {
        printf("%d\n", (val & m) && 1);
        m = m >> 1;
    }
 }

SetBits Function

Fuction to set bits on given no of bit

void setBits(unsigned int&, int BitNo, bool value)
    {
        if(value)
         {
            v = v | (1 << (BitNo - 1));
         }
         else
         {
            v = v & ~(1 << (BitNo - 1));
         }
    }