cc150 2.1

duplicate_list

#include <iostream>
void duplicate_list(node *head){
    if(head==NULL) return;
    node *p, *q, *c=head;
    while(c){
        p=c; q=c->next;
        int d = c->data;
        while(q){
            if(q->data==d){
                node *t = q;
                p->next = q->next;
                q = p->next;
                delete t;
            }
            else{
                p = q; q = q->next;
            }
        }
        c = c->next;
    }
}