typerdef struct queue

{

node*vao,ra

};

struct node

{int x;

node*next;

};

void khoitaohd(queue&Q)

{

Q.vao=null;

Q.ra=null;

}

// them 1 phan tu x vao hd

void them(quenue&Q,int x)

{

node*e;

e=new(node);

e->x=x

e->next=NULl;

if(Q.ra==null)

{

q.ra=e;

q.vao=e;

else

{

q.vao->next=e

e=null

delete(e);

}

//lay 1 phan tu ra khoi hang doi

void pop(int &x,queue&Q)

{

node*tam;

tam=Q.ra;

Q.ra=Q.ra->next

x=tam->x

tam->next=null;

delete(tam);

}