Answer Posted / ashish gupta

rev()
{
struct node *a1,*a2,*a3;
if(start->next==NULL) /*Only one element exists*/
return;
a1=start;
a2=a1->next;
a3=a2->next;
a1->next=NULL;
a2->next=a1;
while(a3!=NULL)
{
a1=a2;
a2=a3;
a3=a3->next;
a2->next=a1;
}
start=a2;
}

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