list.cpp
1.42 KB
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#include <iostream>
using namespace std;
#include "list.h"
list::list()
{
head = NULL;
current = NULL;
}
list::~list()
{
while (head) {
node* t = head->next;
delete head;
head = t;
};
}
void list::insert(int a)
{
node* t = new node;
t->next = head;
head = t;
head->val = a;
}
void list::goToHead()
{
current = head;
}
int list::getCurrentData()
{
return current->val;
}
void list::advance()
{
current = current->next;
}
bool list::moreData()
{
if (current)
return true;
else
return false;
}
list::list(const list& l)
{
current = NULL;
node *src, **dst;
head = NULL;
src = l.head;
dst = &head;
while (src) {
*dst = new node;
(*dst)->val = src->val;
(*dst)->next = NULL;
if (src == l.current)
current = *dst;
src = src->next;
dst = &((*dst)->next);
}
}
list& list::operator=(const list& l)
{
if (&l == this)
return *this;
current = NULL;
while (head) {
node* t = head->next;
delete head;
head = t;
};
node *src, **dst;
head = NULL;
src = l.head;
dst = &head;
while (src) {
*dst = new node;
(*dst)->val = src->val;
(*dst)->next = NULL;
if (src == l.current)
current = *dst;
src = src->next;
dst = &((*dst)->next);
}
return *this;
}