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plt pr=0;
plt pn=0;
plt pc=phead;
while(pc!=0)
{
pn=pc->Next;
pc->Next=pr;
pr=pc;
pc=pn;
}
return pr;
void _print(plt phead)
plt p=phead;
while(p!=0)
printf("%d \n",p->data); p=p->Next;
printf("phead %d \n",phead->data); }