C / C++ / MFC

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

class IMessage<br />
{<br />
  virtual void Func1() = 0;<br />
  // Declare all the public functions as pure virtual functions<br />
};<br />
<br />
<br />
class CMessage : public IMessage<br />
{<br />
   void Func1();<br />
   // ...<br />
}<br />

void initialize(link * head, int nCount)
{
	head->a = 0;
	for (int i = 1; i <= nCount; i++)
	{
		link *tmp = new link;
		if(i!=nCount)
		{
			tmp->a=i;
		}
		else
		{
			tmp->a=0;
		}
		head->next=tmp;
		head=tmp;
	}	
}	

<br />
int main()<br />
{<br />
 	link *head = new link;<br />
	initialize(head/*changed the head address inside*/, 10); <br />
	print(head/*still the same with initial head address, why???:doh: */); <br />
}<br />

void myFunc(int i)
{
    i = 25; // set copy equal to 25
}
int main()
{
    int i = 0; // local variable
    myFunc(i);
    // local variable i is still equal to 0
   return(0);
}

struct link
{
    // default constructor
    link(){}
    
    link( const int n)
    {
        a = n;
        next = NULL;
    }
    
    int a;
 
    // pointer to next link in list
    link *next;
};
 
// pointers to first and last items in list
struct link *first = NULL;
struct link *last  = NULL;
 
//====================================================================
 
void addhead( struct link *newlink )
{
    if (NULL == last)
        last = newlink;
 
    if (NULL != first)
        newlink->next = first;
 
    first = newlink;
}
 
//====================================================================
 
void addhead( const int num )
{
    struct link *newlink = new struct link(num);
    addhead(newlink);
}
 
//====================================================================
 
void addtail( struct link *newlink )
{
    if (NULL == first)
        first = newlink;
 
    if (last != NULL)
        last->next = newlink;
    
    last = newlink;
}
 
//====================================================================
 
void addtail( const int num )
{
    struct link *newlink = new struct link(num);
    addtail(newlink);
}
 
//====================================================================
 
void main( void )
{
    struct link *list;
 
    // you can also put this in an initialize() function
    for (int x = 0; x < 10; x++)
        addtail(new struct link(x));
    
    // add a few other link (using a number)
    addtail(15);
    addhead(2);
    addtail(288);
 
    // print out the list
    list = first;
    while (NULL != list)
    {
        cout << list->a << endl;
        list = list->next;
    }
}

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown