大佬能帮解释一下这个循环里if flag等于1是用来干嘛的呀
//A、B等长 if(p->next==NULL&&q->next==NULL){ sum=p->data+q->data+flag;
p->data=sum%8;
flag=sum/8;
if(flag==1)
{ node* s = new node;
s->data = flag;
s->next = NULL;
p->next=s; } }