How can I have a linked-list using class? - c++

Question

I'm trying to write a linked-list using class and I want it to have a specific format.
For example if I have three data called p1,p2 and p3 and a linked-list called list; I want to put them in order like blow.
list.insert(p1).insert(p2).insert(p3);
I tried to return the object, but didn't work.
Here's my code.
#include<iostream>
using namespace std;
class linked_list {
public:
int *head;
linked_list();
~linked_list();
linked_list insert(int data);
};
linked_list::linked_list()
{
head = NULL;
}
linked_list::~linked_list()
{
int *temp;
int *de;
for (temp = head;temp != NULL;) {
de = temp->next;
delete temp;
temp = de;
}
delete temp;
//delete de;
}
linked_list linked_list::insert(int data)
{
int *temp;
temp = new int;
*temp = data;
temp->next = NULL;
if (head == NULL) {
head = temp;
}
else {
int* node = head;
while (node->next != NULL) {
node = node->next;
}
node->next = temp;
// delete node;
}
//delete temp;
return *this;
}
int main(){
linked_list l1;
int p1,p2,p3;
l1.insert(p1).insert(p2).insert(p3);
return 0;}

Answer 1

#Jarod42 got your answer, despite all the buggy things around, what you want is something like this.
The function you want to chain must return a reference to your current object instance.
Here is a Foo class that change its _data member and chain multiple time.
#include <iostream>
class Foo
{
private:
int _data;
public:
Foo(int data) : _data(data) {}
~Foo()
{
}
// change the value of data then return a reference to the current Foo instance
Foo &changeData(int a)
{
_data = a;
return *this;
}
void printData()
{
std::cout << _data << std::endl;
}
};
int main()
{
Foo f(1);
f.changeData(2).changeData(3);
f.printData();
}
Note that I'm returning Foo& from the function I'm chaining, that's the little trick that is missing from yours.
Hope it helped you :)