the linklist doesn't work

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#include <iostream>
#include <stack>
#include <windows.h>
using namespace std;
typedef struct node
{
int key;
node*next;
node(node*p, int m): next(p),key(m){};
}*linklist,node;

stack<int>liststack;
class link
{
public:
link()
{
p=new node(NULL,0);
n=0;

}

linklist build();
void traverse(node*p);
private:
int n;
linklist p;
};
linklist link::build()
{
cout<<"please input the number n:"<<endl;
cin>>n;

for(int i=0;i<n;i++)
{
linklist p1=new node(NULL,0);
int a;
cout<<"please input the node:---"<<endl;
cin>>a;

p1->key=a;
p1->next=p->next;
p->next=p1;
p=p1;
}
return p;
}
void link::traverse(node*p)
{
int i=0;
while(p->next!=NULL)
{
linklist p0=p->next;
int b=p0->key;
cout<<"the---"<<i<<" --value is"<<b;
cout<<endl;
Sleep(100);
liststack.push(b);
  p=p->next;
i++;
}

}

int main()
{
link mylink;
linklist q=mylink.build();
mylink.traverse(q);
system("pause");
return 0;
}


I don't know why the mylink.traverse(q); doesn't work
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#include <iostream>
#include <stack>
#include <windows.h>
using namespace std;
typedef struct node
{
int key;
node*next;
node(node*p, int m): next(p),key(m){};
}*linklist,node;

stack<int>liststack;
class link
{
public:
link()
{
n=0;
}

linklist build(node*m);
void traverse(node*p);
private:
int n;

};
linklist link::build(node*m)
{
         m->next=NULL;
         m->key=0;
cout<<"please input the number n:"<<endl;
cin>>n;
linklist r=m;
for(int i=0;i<n;i++)
{
linklist p1=new node(NULL,0);
int a;
cout<<"please input the node:---"<<endl;
cin>>a;

p1->key=a;
p1->next=m->next;
r->next=p1;
r=p1;
}
return r;
}
void link::traverse(node*p)
{
int i=0;
while(p->next!=NULL)
{
linklist p0=p->next;
int b=p0->key;
cout<<"the---"<<i<<" --value is"<<b;
cout<<endl;
Sleep(400);
liststack.push(b);
  p=p->next;
i++;
}

}

int main()
{
link mylink;
linklist q=mylink.build(q);
mylink.traverse(q);
system("pause");
return 0;
}

This is my new code, which I have modified a little bit, but it keeps printing, I don't know how to correct it
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