string Number;

cout<<"请输入要查找的学生的学号:"; cin>>Number; current=previous=head; while(current) {

if(current->number==Number) {

cout<<setiosflags(ios::left)<<setw(15)<<"学号"<<setw(15)<<"姓名"<<setw(12)<<"性别"<<setw(5)<<"成绩"<<endl; cout<<current; return true; } Else {

previous=current; current=current->next;

} }

if(!current) {

cout<<"没有找到该学生!"; return false; }

return true; }

3.3.4删除学生记录delete_record()

具体实现如下：