Explain the code please,how it outputs 2.

[talhakhan797]

[CODE]#include<iostream>
using namespace std;
#include<string>;

class node {
public:
	int num;
	class node * next;
	node(int n)
	{
		num=n;
		next=NULL;
	}
};

void f(class node **n,int val)
{
	*n=new node(val);
	if(val==0)
	return;

	else
		f(&((*n)->next),val-1);
}
int main()
{
	
	class node * t= NULL;
	f(&t,3);
	cout<<t->next->num;
	system("pause");
}
[/CODE]