compile visual studio c++ online

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#include <iostream>
using namespace std;

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

void PrintList (node *C)
{  
    node *P;
    cout<<"Node content = (";
    P = C;
    while(P!=NULL)
    {
        cout<<P->info;
        P = P->next;
        if(P != NULL) 
            cout<<",";       
    }
    cout<<")"<<endl;
}

void copylist (node *Y, node **Z)
{
    node *P, *Q;
    int temp;
    if (Y==NULL)
    {
        cout<<"the list is empty"<<endl;
        *Z=NULL;
    }
    else
    {
        P=Y;
        Q=*Z;
        while (P->next!=NULL)
        {
            temp=P->info;
            Q->info=temp;
            P=P->next;
            Q=Q->next;
        }
    }
}

int main ()
{
    node *z;
    node *duplicate;
    z=NULL;
    duplicate=new node;
    int e;
    int i;
    int *temp;
    temp=new int;

cout<<"the number of element : ";
    cin>>e;

cout<<" LIST Z CONTENT : " <<endl;
    PrintList (z);

copylist(z,&duplicate);

cout<<" DUPLICATE LIST CONTENT : "<<endl;
    PrintList(duplicate);
}

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Compilation time: 1.26 sec, absolute running time: 0.16 sec, absolute service time: 1.43 sec