Необходимо доделать программу

#include <iostream>
#include <string>
using namespace std;
struct TNode;
typedef TNode* PNode;
struct TNode
{
string data;
PNode Next;
};
void AddElement (PNode& First, string data)
{
PNode p = new TNode;
p->data=data;
p->Next=First;
First=p;
}
void InputCircle (PNode& First, int n)
{
string data;
for (int i=0; i<n; i++)
{
cin>>data;
AddElement (First, data);
}
PNode p = First;
for (int i=0; i<n; i++)
{
if (i==n-1)
p->Next=First;
else 
p=p->Next;
}
}
void PrintCircle (PNode& First, int n)
{
PNode p = First;
for (int i=0; i<n; i++)
{
cout<<p->data<<endl;
p=p->Next;
}
}
void PrintCircle2 (PNode& First,PNode& Second, int n,int m)
{
PNode p = First;
PNode q = Second;
cout<<endl<<"Spisok:"<<endl;
for (int i=0; i<n; i++)
{
for (int j=0; j<m; j++)
{
cout<<p->data<<"  "<<q->data<<endl;
p=p->Next;
q=q->Next;
}
}
}
int main ()
{
int n;
int m;
cout<<"Vvedite kol-vo pokupatele:"<<endl;
cin>>n;
PNode First = NULL;
PNode Second = NULL;
cout<<"Vvedite familii pokupatele:"<<endl;
InputCircle (First, n);
cout<<"Vvedite nazvanie tovarov"<<endl;
InputCircle (Second, m);
cout<<endl<<"familii:"<<endl;
PrintCircle (First, n);
cout<<endl<<"tovari:"<<endl;
PrintCircle (Second, m);
PrintCircle2 (First, Second,n,m);
 
return 0;
}