cin>>Chengji;

newnode=new student();

newnode->init(Name,Number,Sex,Chengji); newnode->next=null; if(!newnode) {

cout<<"内存已满!"; return false; }

if(i==1) {

newnode->next=head; head=newnode; return true; } Else {

while(current&&j<i) {

previous=current; current=current->next; j++; }

newnode->next=current; previous->next=newnode; return true; } }