#include <stdio.h>
#include <ctime.h>
#define SIZE            (1000*1000)


struct item
{
int key;
void *data;
item *next;
};


item *head;


void main()
{
int i;
item *p;
time_t ts0,ts1;
head=new item;
p=head;
for(i=0;i<SIZE-1;i++)
{
p->next=new item;
if (p->next==NULL) printf("\nerror");
p=p->next;
}
printf("\npoint0");
ts0=time(NULL);
for(i=0;i<600;i++)
for(p=head;p!=NULL;p=p->next)
p->key=0;
printf("\npoint1");
ts1=time(NULL);
printf("\ntime elapsed %d (s)\n",(int)(ts1-ts0));
scanf("%d",&i);
}