#include <iostream>

using namespace std;

struct node{
    int val;
    node* next;
};

void add(node* test, int a ){
    node* temp = new node;
    temp->val =a;
    temp->next = NULL;
    if(test==NULL){
        test=temp;
    }else{
        node* t = test;
        while(t->next!=NULL){
            t=t->next;
        }
        t->next = temp;
    }
}

int main(){
    node* a;
    a = NULL;
    add(a, 10);
    cout<<a->val;


    return 0;
}