Single Link List Comprehensive Example

#include<iostream>
	using namespace std;
	struct node
	{
	int data;
	node *next;
	};
	class list
	{
	private:
	node *head, *tail;
	public:
	list()
	{
	head=NULL;
	tail=NULL;
	}
	void createnode(int value)
	{
	node *temp=new node;
	temp->data=value;
	temp->next=NULL;
	if(head==NULL)
	{
	head=temp;
	tail=temp;
	temp=NULL;
	}
	else
	{
	tail->next=temp;
	tail=temp;
	}
	}
	void display()
	{
	node *temp=new node;
	temp=head;
	while(temp!=NULL)
	{
	cout<<temp->data<<"\t";
	temp=temp->next;
	}
	}
	void insert_start(int value)
	{
	node *temp=new node;
	temp->data=value;
	temp->next=head;
	head=temp;
	}
	void insert_position(int pos, int value)
	{
	node *pre=new node;
	node *cur=new node;
	node *temp=new node;
	cur=head;
	for(int i=1;i<pos;i++)
	{
	pre=cur;
	cur=cur->next;
	}
	temp->data=value;
	pre->next=temp;
	temp->next=cur;
	}
	void delete_first()
	{
	node *temp=new node;
	temp=head;
	head=head->next;
	delete temp;
	}
	void delete_last()
	{
	node *current=new node;
	node *previous=new node;
	current=head;
	while(current->next!=NULL)
	{
	previous=current;
	current=current->next;
	}
	tail=previous;
	previous->next=NULL;
	delete current;
	}
	void delete_position(int pos)
	{
	node *current=new node;
	node *previous=new node;
	current=head;
	for(int i=1;i<pos;i++)
	{
	previous=current;
	current=current->next;
	}
	previous->next=current->next;
	}
	};
	int main()
	{
	list obj;
	obj.createnode(25);
	obj.createnode(50);
	obj.createnode(90);
	obj.createnode(40);
	cout<<"\n--------------------------------------------------\n";
	cout<<"---------------Displaying All nodes---------------";
	cout<<"\n--------------------------------------------------\n";
	obj.display();
	cout<<"\n--------------------------------------------------\n";
	cout<<"-----------------Inserting At End-----------------";
	cout<<"\n--------------------------------------------------\n";
	obj.createnode(55);
	obj.display();
	cout<<"\n--------------------------------------------------\n";
	cout<<"----------------Inserting At Start----------------";
	cout<<"\n--------------------------------------------------\n";
	obj.insert_start(50);
	obj.display();
	cout<<"\n--------------------------------------------------\n";
	cout<<"-------------Inserting At Particular--------------";
	cout<<"\n--------------------------------------------------\n";
	obj.insert_position(5,60);
	obj.display();
	cout<<"\n--------------------------------------------------\n";
	cout<<"----------------Deleting At Start-----------------";
	cout<<"\n--------------------------------------------------\n";
	obj.delete_first();
	obj.display();
	cout<<"\n--------------------------------------------------\n";
	cout<<"-----------------Deleing At End-------------------";
	cout<<"\n--------------------------------------------------\n";
	obj.delete_last();
	obj.display();
	cout<<"\n--------------------------------------------------\n";
	cout<<"--------------Deleting At Particular--------------";
	cout<<"\n--------------------------------------------------\n";
	obj.delete_position(4);
	obj.display();
	cout<<"\n--------------------------------------------------\n";
	system("pause");
	return 0;
	}