Problem when using a template classes to store user-defined types

[sidatra79]

Hallo everybody. I am a student trying to extend my knowledge in cPP while using UML and system modelling.
I created a "vector template class" using the rhapsody system modeling tool for storing different data types. I used the template to store int and float data types successfully using either composition or aggregation.

Now and in order to learn sth more I tried to use the template for storing my own defined data type of a class CNotebook which inherits from a CDesktopPC class.

Unfortunately it doesnt compile. (see lines 140-144 of CTesterClass) I suspect that I have to overload some operators but I am not sure where I should do that.

I attach you the UML diagram to get a rough idea of what I am trying exactly to do and both the vector template class and the CNotebook, CDesktopPC, CTesterClass and VectorOfNotebooks classes.

A. CDesktopPC class:

SPECIFICATION:
..........
#include <iostream>
#include <sstream>

//## class CDesktopPC
class CDesktopPC {
    ////    Constructors and destructors    ////
public :
    CDesktopPC(const std::string & man, const std::string proc, int ram, int disk);
    CDesktopPC();
    ~CDesktopPC();  
    ////    Operations    ////
    int get_disk_size() const;   
    std::string get_manufacturer() const;  
    std::string get_processor() const;    
    int get_ram_size() const;     
    void set_disk_size(int ds);     
    void set_manufacturer(const std::string manu); 
    void set_processor(const std::string pro); 
    void set_ram_size(int rs);    
    virtual std::string to_string() const;    
    ////    Attributes    ////
private :
    int disk_size;		//## attribute disk_size
    std::string manufacturer;		//## attribute manufacturer
    std::string processor;		//## attribute processor
    int ram_size;		//## attribute ram_size
};
...........
IMPLEMENTATION:
...........
#include "CDesktopPC.h"

CDesktopPC::CDesktopPC(const std::string & man, const std::string proc, int ram, int disk) : manufacturer(man),processor(proc),ram_size(ram),disk_size(disk)  {}
CDesktopPC::CDesktopPC() {}
CDesktopPC::~CDesktopPC() { std::cout<<"Destructor of CDesktopPC."<<std::endl;}
int CDesktopPC::get_disk_size() const {return disk_size;}
std::string CDesktopPC::get_manufacturer() const { return manufacturer;}
std::string CDesktopPC::get_processor() const {return processor;}
int CDesktopPC::get_ram_size() const { return ram_size;}
void CDesktopPC::set_disk_size(int ds) { disk_size=ds;}
void CDesktopPC::set_manufacturer(const std::string manu) {manufacturer=manu;}
void CDesktopPC::set_processor(const std::string pro) {processor=pro;}
void CDesktopPC::set_ram_size(int rs) {ram_size=rs;}
std::string CDesktopPC::to_string() const {
    //#[ operation to_string() const
    std::ostringstream sb;
    sb<<"manufacturer: "<<manufacturer
    <<"\nCPU: "<<processor
     <<"\nRAM: "<<ram_size<< " megabytes"
     <<"\nDisk: "<<disk_size<<" gigabytes";
     return sb.str();
}

B. CNotebook class:

SPECIFICATION:
.........
#include "CDesktopPC.h"

class CNotebook : public CDesktopPC {
    ////    Constructors and destructors    ////
public :
    CNotebook(const std::string & proc, int ram, int disk, double screen, double wei);
    CNotebook(const std::string & man, const std::string & proc, int ram, int disk, double screen, double wei);
    CNotebook();
    ~CNotebook();
    ////    Operations    ////
    double get_screen_size() const;
    double get_weight() const;
    void set_size(double sz);
    void set_weight(double we);
    std::string to_string() const;
    ////    Attributes    ////
    static const char * DEFAULT_LT_MAN;		//## attribute DEFAULT_LT_MAN
private :
    double screen_size;		//## attribute screen_size
    double weight;		//## attribute weight
};
.......
IMPLEMENTATION:
.......
#include "CNotebook.h"

const char * CNotebook::DEFAULT_LT_MAN("H MARKA MOU");
CNotebook::CNotebook(const std::string & proc, int ram, int disk, double screen, double wei) : CDesktopPC(DEFAULT_LT_MAN,proc,ram,disk),screen_size(screen),weight(wei)  {}
CNotebook::CNotebook(const std::string & man, const std::string & proc, int ram, int disk, double screen, double wei) : CDesktopPC(man,proc,ram,disk),screen_size(screen),weight(wei)  {}

CNotebook::CNotebook() {}
CNotebook::~CNotebook() {}
double CNotebook::get_screen_size() const {    return screen_size;}
double CNotebook::get_weight() const { return weight;}
void CNotebook::set_size(double sz) { screen_size=sz;}
void CNotebook::set_weight(double we) { weight=we;}
std::string CNotebook::to_string() const {
    std::ostringstream sb;
    sb<<CDesktopPC::to_string()
    <<"\nScreen size: "<<screen_size
     <<"\nWeight: "<<weight;
     return sb.str();
}

C. CVectorTemplate class

SPECIFICATION:
........
#include <stdexcept>

template <typename Item_Type> 
class CVectorTemplate {
    ////    Constructors and destructors    ////
public :
    CVectorTemplate();    
    virtual ~CVectorTemplate();
    ////    Attributes    ////
private :
    static size_t INITIAL_CAPACITY;		//## attribute INITIAL_CAPACITY
    size_t current_capacity;		//## attribute current_capacity
    size_t num_items;		//## attribute num_items
    Item_Type* the_data;		//## attribute the_data
public :
    void erase(size_t index);  //Remove an entry based on its index
    void insert(size_t index, const Item_Type& the_value);  // Insert an entry to the data inserting it before the item at the specified index.
    Item_Type& operator[](size_t index);  //Get a value in the vector based on its index.
    const Item_Type& operator[](size_t index) const;  // Get a constant value in the vector based on its index.
    void pop_back();  //Remove the last item in the vector. 
    void push_back(const Item_Type& the_value);   //Insert a new item at the end of the vector.
    void reserve(size_t new_capacity);  //Ensure that the capacity is at least a given size.
    void swap(CVectorTemplate<Item_Type>& other);  //Exchanges the contents of this vector with another.
    CVectorTemplate(const CVectorTemplate<Item_Type>& other);  //Make a copy of a CVectorTemplate.
    size_t CVectorTemplatesize() const;   // Get the current size of the vector
    Item_Type& back();  //Return a reference to the last item.
    const Item_Type& back() const;  //Return a const reference to the last item.
    size_t capacity();   //Get the current capacity of the vector
    bool emptyCVectorTemplate() const;  //Determine if the vector is empty
    Item_Type& front();  //Return a reference to the first item
    const Item_Type& front() const;  //Return a const reference to the first item
    CVectorTemplate<Item_Type>& operator=(const CVectorTemplate<Item_Type>& other);  // Assign the contents of one vector to another. 
};
// ----------------------------------------------------------------------------
// End of CVectorTemplate.h
// ----------------------------------------------------------------------------
template <typename Item_Type> size_t CVectorTemplate<Item_Type>::INITIAL_CAPACITY(10);

template <typename Item_Type> CVectorTemplate<Item_Type>::CVectorTemplate() : current_capacity(INITIAL_CAPACITY),the_data(new Item_Type[INITIAL_CAPACITY]),num_items(0) {}

template <typename Item_Type> CVectorTemplate<Item_Type>::CVectorTemplate(const CVectorTemplate<Item_Type>& other) : current_capacity(other.capacity),num_items(other.num_items),the_data(new Item_Type[other.current_capacity]) {
    for (size_t i=0;i<num_items;i++)
    	the_data[i]=other.the_data[i];   }

template <typename Item_Type> CVectorTemplate<Item_Type>::~CVectorTemplate() {
         delete[] the_data;    }

template <typename Item_Type> size_t CVectorTemplate<Item_Type>::CVectorTemplatesize() const { return num_items;  }

template <typename Item_Type> Item_Type& CVectorTemplate<Item_Type>::back() {
          if (num_items == 0)
    	throw std::out_of_range
    	  ("Attempt to access back of empty vector");
          return the_data[num_items-1];          }

template <typename Item_Type> const Item_Type& CVectorTemplate<Item_Type>::back() const {
          if (num_items == 0)
    	throw std::out_of_range
    	  ("Attempt to access back of empty vector");
          return the_data[num_items-1];          }

template <typename Item_Type> size_t CVectorTemplate<Item_Type>::capacity() {
    return current_capacity;      }

template <typename Item_Type> bool CVectorTemplate<Item_Type>::emptyCVectorTemplate() const {return num_items == 0;}

template <typename Item_Type> void CVectorTemplate<Item_Type>::erase(size_t index) {    // Validate index.
    if (index >= num_items) {
    	throw std::out_of_range
    	("index to erase is out of range");     }
    // Move items below the removed one up.
    for (size_t i = index + 1; i < num_items; i++) {
    	the_data[i - 1] = the_data[i];       }
    num_items--;        }

template <typename Item_Type> Item_Type& CVectorTemplate<Item_Type>::front() {
    if (num_items == 0)
    	throw std::out_of_range
    	  ("Attempt to access front of empty vector");
          return the_data[0];     }

template <typename Item_Type> const Item_Type& CVectorTemplate<Item_Type>::front() const {
    if (num_items == 0)
    	throw std::out_of_range
    	  ("Attempt to access front of empty vector");
          return the_data[0];      }

template <typename Item_Type> void CVectorTemplate<Item_Type>::insert(size_t index, const Item_Type& the_value) {
    // Validate index
    if (index > num_items) {
    	throw std::out_of_range
    	("index to insert is out of range");         }
    // Ensure that there is space for the new item
    if (num_items == current_capacity) {
    	reserve(2 * current_capacity);   // allocate an expanded array        }
    // Move data from index to num_items-1 down
    for (size_t i = num_items; i > index; i--) {
    	the_data[i] = the_data[i - 1];        }
    // Insert the new item
    the_data[index] = the_value;
    num_items++;      }

template <typename Item_Type> CVectorTemplate<Item_Type>& CVectorTemplate<Item_Type>::operator=(const CVectorTemplate<Item_Type>& other) {
    //Make a copy of the other CVectorTemplate object.
    CVectorTemplate<Item_Type> the_copy(other);        
    //above the "deep copy constructor" was used
    //Now we swap the contents of self with the copy(the_copy) we made before.
    swap(the_copy);
    //finally we return the object. Upon return the copy will be destroyed.
    return *this;         }

template <typename Item_Type> Item_Type& CVectorTemplate<Item_Type>::operator[](size_t index) {
    // Verify that the index is legal
    if (index >= num_items) {
    	throw std::out_of_range
    	("index to operator[] is out of range");        }    
    return the_data[index];     }

template <typename Item_Type> const Item_Type& CVectorTemplate<Item_Type>::operator[](size_t index) const {
    // Verify that the index is legal
    if (index >= num_items) {
    	throw std::out_of_range
    	  ("index to operator[] is out of range");          }
    return the_data[index];     }

template <typename Item_Type> void CVectorTemplate<Item_Type>::pop_back() {    
    num_items--;     }

template <typename Item_Type> void CVectorTemplate<Item_Type>::push_back(const Item_Type& the_value) {
    // Make sure there is space for the new item.
     if (num_items == current_capacity) {
    		reserve(2 * current_capacity);   // Allocate an expanded array       	}
     // Insert the new item.
     the_data[num_items] = the_value;
     num_items++;         }

template <typename Item_Type> void CVectorTemplate<Item_Type>::reserve(size_t new_capacity) {
    if (new_capacity > current_capacity) {
    	if (new_capacity > 2 * current_capacity)
    	  	current_capacity = new_capacity;
    	else
    	  	current_capacity *= 2;  // Double the capacity.
    	
    	Item_Type* new_data = new Item_Type[current_capacity];
    	// Copy the data over
    	for (size_t i = 0; i < num_items; i++)
    	  	new_data[i] = the_data[i];
    	// Free the memory occupied by the old copy.
    	delete[] the_data;
    	// Now point to the new data
    	the_data = new_data;
        }
}

template <typename Item_Type> void CVectorTemplate<Item_Type>::swap(CVectorTemplate<Item_Type>& other) {
          std::swap(num_items, other.num_items);
          std::swap(current_capacity, other.current_capacity);
          std::swap(the_data, other.the_data);
}
........

D. CTesterClass class

SPECIFICATION:
........
#include "CNotebook.h"       //## dependency CNotebook
#include "vect1int.h"           //## link itsVect1int
#include "vect2int.h"             //## link itsVect2int
#include "vect3float.h"         //## link itsVect3float
class VectorOfNotebooks;     //## link itsVectorOfNotebooks
class bindingclass;      //## link itsBindingclass

class CTesterClass {
    ////    Constructors and destructors    ////
public :
    CTesterClass();
    ~CTesterClass();
    ////    Operations    ////
    //## operation testCVectorTemplateClass()
    void testCVectorTemplateClass();
    ////    Additional operations    ////
    //## auto_generated
    bindingclass* getItsBindingclass() const;
    //## auto_generated
    void setItsBindingclass(bindingclass* p_bindingclass);
    //## auto_generated
    vect1int* getItsVect1int() const;
    //## auto_generated
    vect2int* getItsVect2int() const;    
    //## auto_generated
    vect3float* getItsVect3float() const;
    //## auto_generated
    VectorOfNotebooks* getItsVectorOfNotebooks() const;
    //## auto_generated
    void setItsVectorOfNotebooks(VectorOfNotebooks* p_VectorOfNotebooks);
protected :
    //## auto_generated
    void cleanUpRelations();
    ////    Relations and components    ////
    bindingclass* itsBindingclass;		//## link itsBindingclass
    vect1int itsVect1int;		//## link itsVect1int
    vect2int itsVect2int;		//## link itsVect2int
    vect3float itsVect3float;		//## link itsVect3float
    VectorOfNotebooks* itsVectorOfNotebooks;		//## link itsVectorOfNotebooks 
};
........
IMPLEMENTATION:
........
#include "CTesterClass.h"
#include "bindingclass.h"       //## link itsBindingclass
#include "VectorOfNotebooks.h"     //## link itsVectorOfNotebooks

CTesterClass::CTesterClass() {
    itsBindingclass = NULL;
    itsVectorOfNotebooks = NULL;
    testCVectorTemplateClass();      }

CTesterClass::~CTesterClass() {
    cleanUpRelations();                  }

void CTesterClass::testCVectorTemplateClass() {
    vect1int vect1;  
    //gemise ton vect1 me 20 stoixeia ta poia periexoun tous akeraious 0 ws 19       
    for (int i = 0; i < 20; i++) {
        vect1.push_back(i);           }
      bool pass1 = true;  
      //tsekare to index tou vect1
      for (int i = 0; i < 20; i++) {
        if (i != vect1[i]) {
          std::cout << i << " != vect1[" << i << "] == "<< vect1[i] << '\n';
          pass1 = false;        }
      }
      if (pass1)
        std::cout << "Index test passed\n";  
        
     std::cout<<"the last item of vect1int vect1 is" <<vect1.back()<<std::endl; 
     std::cout<<"the first item of vect1int vect1 is" <<vect1.front()<<std::endl; 
     
       //Check Out of range negative index
      bool passed1b = false;
      try {
        vect1[-1] = 0;
      } catch (std::out_of_range& ex) {
        passed1b = true;
       std::cout << "Out of range negative index test passed\n";
      }
      if (!passed1b)
        std::cout << "Out of range negative index test failed\n"; 
        
      //check  Out of range index too large
     bool passed1c = false;
      try {
        vect1[vect1.CVectorTemplatesize()] = 0;
      } catch (std::out_of_range& ex) {
        passed1c = true;
       std:: cout << "Out of range index too large test passed\n";
      }
      if (!passed1c)
        std::cout << "Out of range index too large test failed\n";
    ///////////______________________________________________///////////////            
    vect2int vect2;  
    //gemise ton vect2 me 20 stoixeia ta poia einai:0,2,4,6,8,10,12,14,16,18  
      for (int i = 0; i < 20; i += 2) {
        vect2.push_back(i);           }
      for (int i = 0; i < 20; i += 2) {
        vect2.insert(i+1, i+1);       } 
      
      bool pass2 = true; 
      //tsekare to index tou vect
      for (int i = 0; i < 20; i++) {
        if (i != vect2[i]) {
          std::cout << i << " != vect2[" << i << "] == "<< vect2[i] << '\n';
          pass2 = false;
        }
      }
      if (pass2)
        std::cout << "Insert test passed\n";  
        
     std::cout<<"the last item of vect2int vect2 is" <<vect2.back()<<std::endl; 
     std::cout<<"the first item of vect2int vect2 is" <<vect2.front()<<std::endl;  
    ///////////______________________________________________///////////////  
    vect3float vect3;   
    
     //gemise ton vect3 me 20 stoixeia ta poia einai:0.0,2.0,4.0,6.0,8.0,10.0,12.0,14.0,16.0,18.0  
      for (float i = 0.0; i < 20.0; i += 2.0) {
        vect3.push_back(i);     
      }
        vect3.pop_back();
        std::cout<<"the last item of vectfloat vect3 is" <<vect3.back()<<std::endl;        
    ///////////______________________________________________///////////////       
    itsBindingclass= new  bindingclass;     
     
    //gemise ton vect4 me 20 stoixeia ta poia einai:0,2,4,6,8,10,12,14,16,18  
      for (int i = 0; i < 20; i += 2) {
        itsBindingclass->push_back(i);     
      }
       itsBindingclass->pop_back();  
       itsBindingclass->pop_back(); 
        std::cout<<"the last item of vectfloat vect4 is" <<itsBindingclass->back()<<std::endl;
    ///////////______________________________________________///////////////   
    itsVectorOfNotebooks = new VectorOfNotebooks;
    
	///--------------///MY PROBLEM: ///--------------//
///////////////all next three statements cause a compile error
    //itsVectorOfNotebook->insert(new CNotebook("HP nwer", "Intel P9", 2028, 120,15.4,4.0));
	//itsVectorOfNotebook->insert(CNotebook("HP nwer", "Intel P9", 2028, 120,15.4,4.0));
    //itsVectorOfNotebook.insert(new CNotebook("HP nwer", "Intel P9", 2028, 120,15.4,4.0));
     
    ///////////______________________________________________///////////////  
    ///////////______________________________________________///////////////           
    
    //CDesktopPC c1;
    CDesktopPC Mycomputer("HP", "Intel P4", 2028, 120);
    
    //CNotebook c3("Ace", "AMD Athlon 2000", 512, 60);
    CNotebook YourPC("Ace", "AMD Athlon 2000", 1024, 100, 15.5, 7.5);
     
    CNotebook HerPC("intel II", 128, 20, 17.0, 12.5);
    //cout << c2.manufacturer << ", " << c2.processor << endl;
    
    std::cout << Mycomputer.get_disk_size() << ", " << YourPC.get_ram_size() << std::endl;
    
    std::cout <<"My Computer is:\n "<< Mycomputer.to_string() <<std::endl;
    std::cout <<"Your Pc is:\n "<< YourPC.to_string() << std::endl;      
    std::cout <<"Her Pc is:\n "<< HerPC.to_string() << std::endl; 
    
    //sel196 virtual functions
    CDesktopPC* PC1;
    CDesktopPC* Laptop1;
    
    PC1= new CDesktopPC ("Asus","AMD3",256,40);
    Laptop1= new CNotebook ("Fujitsu","intel 3",1000,60,15.4,6.0);  
    
    std::cout <<"PC1 is:\n "<< PC1->to_string() << std::endl;      
    std::cout <<"Laptop1 is:\n "<< Laptop1->to_string() << std::endl; 
    ///////////______________________________________________///////////////             
bindingclass* CTesterClass::getItsBindingclass() const {
    return itsBindingclass;}
void CTesterClass::setItsBindingclass(bindingclass* p_bindingclass) {
    itsBindingclass = p_bindingclass;}
vect1int* CTesterClass::getItsVect1int() const {
    return (vect1int*) &itsVect1int;}
vect2int* CTesterClass::getItsVect2int() const {
    return (vect2int*) &itsVect2int;}
vect3float* CTesterClass::getItsVect3float() const {
    return (vect3float*) &itsVect3float;}
VectorOfNotebooks* CTesterClass::getItsVectorOfNotebooks() const {
    return itsVectorOfNotebooks;}
void CTesterClass::setItsVectorOfNotebooks(VectorOfNotebooks* p_VectorOfNotebooks) {
    itsVectorOfNotebooks = p_VectorOfNotebooks;
}

void CTesterClass::cleanUpRelations() {
    if(itsBindingclass != NULL)
        {
            itsBindingclass = NULL;
        }
    if(itsVectorOfNotebooks != NULL)
        {
            itsVectorOfNotebooks = NULL;
        }
}

E. VectorOfNotebooks class

SPECIFICATION:
......
#include "CNotebook.h"        //## dependency CNotebook
#include "CVectorTemplate.h"   //## class VectorOfNotebooks
class VectorOfNotebooks : public CVectorTemplate<CNotebook> {
    ////    Constructors and destructors    ////    
public :
    VectorOfNotebooks();
    ~VectorOfNotebooks();    
};
......
IMPLEMENTATION:
......
#include "VectorOfNotebooks.h"
VectorOfNotebooks::VectorOfNotebooks() {}
VectorOfNotebooks::~VectorOfNotebooks() {}
......

Thanks a lot in advance everybody & sorry for the amount of code.
Please feel to free to tell me if u see any bad programming practice.

[CoolGamer48]

The only insert function of the vector template I found takes two parameters - one of type size_t, and the other of type Item_type. When you call it, you're only specifying the Item_type parameter.

Also, I believe the entire purpose of the VectorOfNotebooks class is to not have to use the template directly. There is no added functionality. Use typdefs instead.

typedef CVectorTemplate<CNotebook> VectorOfNotebooks;

[sidatra79]

Yes you are right that i forgot the index. However it still does not compile.

More specifically:

Everything compiles and runs succesfully whenever I use only the statement:

itsVectorOfNotebooks = new VectorOfNotebooks;

However whenever I add any of the following statements so that I add some Notebook objects into the vector data structure comilation fails:

itsVectorOfNotebook->push_back(new CNotebook("HP nwer", "Intel P9", 2028, 120,15.4,4.0));
itsVectorOfNotebook.push_back(new CNotebook("HP nwer", "Intel P9", 2028, 120,15.4,4.0));
itsVectorOfNotebook->insert(0,new CNotebook("HP nwer", "Intel P9", 2028, 120,15.4,4.0));
itsVectorOfNotebook->insert(0,CNotebook("HP nwer", "Intel P9", 2028, 120,15.4,4.0));

The compile error I get is:

Building ------------  CVectorTemplateComponent.exe   ------------
Executing: "C:\aThesisEnv\Telelogic\Rhapsody 7.2\Share\etc\mingwmake.bat" CVectorTemplateComponent.mak build
Setting environment for MinGW
"make.exe"
Compiling CTesterClass.cpp
CTesterClass.cpp: In member function `void CTesterClass::testCVectorTemplateClass()':
CTesterClass.cpp:68: warning: passing negative value `-0x000000001' for converting 1 of `Item_Type& CVectorTemplate<Item_Type>::operator[](size_t) [with Item_Type = int]'
CTesterClass.cpp:135: error: `itsVectorOfNotebook' undeclared (first use this function)
CTesterClass.cpp:135: error: (Each undeclared identifier is reported only once for each function it appears in.)
make: *** [CTesterClass.o] Error 1
Build Done

Note:
I develop the code through rhapsody trying to model everything the same time in UML 2.0. Therefore I used these 2 extra classes: CTesterClass and VectorOfNotebooks.

Thanks again everybody

[CoolGamer48]

@second error
you wrote itsVectorOfNotebook in one or more places (one of which is line 135 of CTesterClass.cpp) where you should have written itsVectorOfNotebooks .

Could you specify which line is 68 in CTestClass.cpp? The line numbers are different since you bundled .h and .cpp files.

[sidatra79]

Thanks a lot. At least you know I got enough tired.... trying to implement this, that I forgot an s...... :zzz:

I added the forgoten s, and removed the new operator:

itsVectorOfNotebooks = new VectorOfNotebooks;
itsVectorOfNotebooks->push_back(CNotebook("HP nwer", "Intel P9", 2048, 120,15.4,4.0));  
itsVectorOfNotebooks->insert(0,CNotebook("HP nwer2", "Intel P10", 2048, 340,15.4,3.0));

and there are nor compilation nor linking errors. :cool:

Two more questions: :?:
1.What about the rest of a code? Do u think there are other things that if changed would improve the code greatly??

2.Of what else should I be careful when using my own data structures to store my other user defined data types?

Thanks a lot again

[sidatra79]

Sorry I forgot to answer you your question concerning the warning.
The line 68 you asked is in:

.......
try {
68:    vect1[-1] = 0;
  } catch 
........

By the way how can I call now the method: to_string()
for the object I created before through:

VectorOfNotebooks = new VectorOfNotebooks;
itsVectorOfNotebooks->push_back(CNotebook("HP nwer", "Intel P9", 2048, 120,15.4,4.0));  
itsVectorOfNotebooks->insert(0,CNotebook("HP nwer2", "Intel P10", 2048, 340,15.4,3.0));