Overloaded function "getline" doesn't match argument list?

[pj123]

I'm supposed to have a doubly linked. Each node should store a person's first and last names, along with their age. Initialize the list with 5 nodes. It should allow for search with name. It should allow for a name to be removed.

There's a slew of errors that I'm not sure how to correct. I'd just like to get rid of the errors so I can finish it but I'm not sure how. A bunch of identifiers are undefined and "Getline" doesn't match argument list. I'm so confused so any guidance at all is greatly appreciated!

#include <iostream>
#include <string>
using namespace std;

typedef string Elem;               
class DNode {                 
private:
	Elem elem;                  
	DNode* prev;                
	DNode* next;                
	friend class DLinkedList;           
};

class DLinkedList {             // doubly linked list
public:
	DLinkedList();             
	~DLinkedList();            
	bool empty() const;             
	const Elem& front() const;          
	const Elem& back() const;           
	void addFront(const Elem& name);        
	void addBack(const Elem& name);     
	void removeFront();             
	void removeBack();              
	void displayViaAge();
	void displayViaName();
private:                  
	DNode* header;              
	DNode* trailer;
protected:                    
	void add(DNode* v, const Elem& name);       
	void remove(DNode* v);         
};

DLinkedList::DLinkedList() {          
	header = new DNode;             
	trailer = new DNode;
	header->next = trailer;         
	trailer->prev = header;
}

void DLinkedList::add(DNode* v, const Elem& name) {
	DNode* u = new DNode;  u->elem = name;      
	u->next = v;                 
	u->prev = v->prev;           
	u->prev->next = u;           
	v->prev = u;
}

void DLinkedList::addFront(const Elem& name)  
{
	add(header->next, name);
}

void DLinkedList::addBack(const Elem& name)   
{
	add(trailer, name);
}

void DLinkedList::remove(DNode* v) {     
	DNode* u = v->prev;            
	DNode* w = v->next;            
	u->next = w;               
	w->prev = u;
	delete v;
}

void DLinkedList::removeFront()      
{
	remove(header->next);
}

void DLinkedList::removeBack()        
{
	remove(trailer->prev);
}


bool DLinkedList::empty() const       
{
	return (header->next == trailer);
}

const Elem& DLinkedList::front() const    
{
	return header->next->elem;
}

const Elem& DLinkedList::back() const     
{
	return trailer->prev->elem;
}

void DLinkedList::displayViaAge() {                     

	DNode*temp = header;

	while (temp != trailer)
	{

		if(howold = age)
		cout << temp->elem << endl;
		temp = temp->next;
	}

	cout << temp->elem << endl;

DLinkedList::~DLinkedList() {           
	while (!empty()) removeFront();     
	delete header;              
	delete trailer;
}

void DLinkedList::add(DNode* v, const Elem& name) {
	DNode* u = new DNode;  u->elem = name;      
	u->next = v;                
	u->prev = v->prev;           
	u->prev->next = u;           
	v->prev = u;
}

void DLinkedList::addFront(const Elem& name)  
{
	add(header->next, name);
}

void DLinkedList::addBack(const Elem& name)   
{
	add(trailer, name);
}

void DLinkedList::remove(DNode* v) {     
	DNode* u = v->prev;             
	DNode* w = v->next;             
	u->next = w;                
	w->prev = u;
	delete v;
}

void DLinkedList::removeFront()       
{
	remove(header->next);
}

void DLinkedList::removeBack()        
{
	remove(trailer->prev);
}


bool DLinkedList::empty() const        
{
	return (header->next == trailer);
}

const Elem& DLinkedList::front() const   
{
	return header->next->elem;
}

const Elem& DLinkedList::back() const     
{
	return trailer->prev->elem;
}

void DLinkedList::displayViaAge() {                     

	DNode*temp = header;

	while (temp != trailer)
	{

		if(howold = age)
		cout << temp->elem << endl;
		temp = temp->next;
	}

	cout << temp->elem << endl;
}

int main() {
	char input = 'z';
	string entry;
	int age;
	DLinkedList person;

	person.addFront("person one");
	person.add("person two");
	person.add("person three");
	person.add("person four");
	person.add("person five");

	cout << "What would you like to do?" << endl;
	cout << "Enter 'A' to: Add someone" << endl;
	cout << "Enter 'B' to: Remove someone" << endl;
	cout << "Enter 'C' to: Search for someone via age" << endl;
	cout << "Enter 'D' to: Search for someone via name" << endl;
	cout << "Enter 'E' to: Quit" << endl;

	while (input != 'f') {

		cin >> input;
		cout << endl;
		char input = 'z';
		while ((input != 'a') && (input != 'b') && (input != 'c') && (input != 'd') && (input != 'e')) {

			cout << "Not an option" << endl;
			cin >> input;
		}

		if ((input == 'a')) {
			cout << "Please enter name: ";
			cin.ignore();
			getline(cin, entry);

			cout << "Please enter age: ";
			cin >> age;
			person.addFront(entry);

		}

		if ((input == 'b')) {
			cout << "Who do you want to delete: ";
			cin.ignore();
			getline(cin, entry);
			person.removeFront();
		}

		if ((input == 'c')) {
			cout << "What is the age of the person?: ";
			person.displayViaAge();
		}

		if ((input == 'd')) {
			cout << "What is the name of the person?: ";
			cin.ignore();
			getline(cin, entry);
			person.addFront(entry);
		}

		if ((input == 'e')) {
			return 0;
		}

		cout << endl;
	}
}

[lastchance]

@pj123
How much of that code did you write? Most of it looks nearly identical to
https://stackoverflow.com/questions/14012741/double-linked-lists
http://www.dreamincode.net/forums/topic/304688-double-linked-list-adding-name-age/
http://www.cplusplus.com/forum/general/88799/
(give or take a little rearrangement of function definitions), but I suspect that code has done the rounds on the internet anyway.

I note that your other posts on this forum are also based on code ripped from other sources. For example,
http://www.cplusplus.com/forum/beginner/226642/#msg1033391
is ripped (with mistakes) from
https://stackoverflow.com/questions/33625157/how-to-implement-priority-queue-in-c/33625353

Maybe if you write your own code and build it up slowly you won't be met with such a wall of errors in one go.

For what it's worth, at least one function is missing a closing brace (you didn't cut-and-paste it very well) and you seem to be ignoring the difference in function calls between add() and addFront().

[Thomas1965]

@lastchance,

how did you found it ?

Any special tools to compare the codes ?

[lastchance]

how did you found it ?
Any special tools to compare the codes ?

Sadly, @Thomas1965, I just see a step change in code style from very professional to one or two lines of very naive code and think they didn't come from the same person.

After that I just put a few of the less idiomatic lines (in quotes) through Google.

It would be abusing my privileges at work to put it through Turnitin, and that would probably throw up a lot of false positives anyway because of the way much coding is fairly idiomatic. Google is adequate here.