import?java.util.Scanner;

class?User?{
????private?String?uname;
????private?String?upass;
????public?String?getUname（）?{
????????return?uname;
????}

????public?String?getUpass（）?{
????????return?upass;
????}

????public?User（String?uname?String?upass）?{
????????this.uname?=?uname;
????????this.upass?=?upass;
????}
}


class?Student?{
????private?String?sname;
????private?String?sid;
????private?int?yscore;
????private?int?escore;
????private?int?mscore;
????public?void?setSname（String?sname）?{
????????this.sname?=?sname;
????}

????public?void?setSid（String?sid）?{
????????this.sid?=?sid;
????}

????public?void?setYscore（int?yscore）?{
????????this.yscore?=?yscore;
????}

????public?void?setEscore（int?escore）?{
????????this.escore?=?escore;
????}

????public?void?setMscore（int?mscore）?{
????????this.mscore?=?mscore;
????}

????public?String?getSname（）?{
????????return?sname;
????}

????public?String?getSid（）?{
????????return?sid;
????}

????public?int?getYscore（）?{
????????return?yscore;
????}

????public?int?getEscore（）?{
????????return?escore;
????}

????public?int?getMscore（）?{
????????return?mscore;
????}

????public?Student（）?{};
????public?Student（String?sname?String?sid?int?yscore?int?escore?int?mscore）?{
????????this.sname?=?sname;
????????this.sid?=?sid;
????????this.yscore?=?yscore;
????????this.escore?=?escore;
????????this.mscore?=?mscore;
????}
}


public?class?StuDemo?{
????static?User[]?users?=?new?User[10];
????static?Student[]?students?=?new?Student[20];
????static?Scanner?sc?=?new?Scanner（System.in）;
????public?static?void?main（String[]?args）?{
????????String?uname?=?““;
????????String?upass?=?““;
????????String?upass2?=?““;
????????String?sname?=?““;
????????String?sid?=?““;
????????int?yscore?=?0;
????????int?escore?=?0;
????????int?mscore?=?0;
????????int?sel?=?-1;
????????String?temp?=?““;
????????flag1:while?（true）?{
????????????System.out.println（“****學生管理系統****“）;
????????????System.out.println（“1.登錄“）;
????????????System.out.println（“2.注冊“）;
????????????System.out.println（“3.退出“）;
????????????switch?（（sel?=?sc.nextInt（）））?{
????????????case?1:?{?//登錄
????????????????sc.nextLine（）;
????????????????System.out.println（“******用戶登錄******“）;
????????????????System.out.println（“請輸入用戶名：“）;
????????????????uname?=?sc.nextLine（）;
????????????????System.out.println（“請輸入密碼：“）;
????????????????upass?=?sc.nextLine（）;
????????????????int?y?=?0;
????????????????for?（;?y?????????????????????if?（users[y]?!=?null）?{
????????????????????????if?（uname.equals（users[y].getUname（））?&&
????????????????????????????upass.equals（users[y].getUpass（）））?{
????????????????????????????break;
????????????????????????}
????????????????????}
????????????????}
????????????????if?（y?==?users.length）?{
????????????????????System.out.println（“用戶名密碼錯誤！“）;
????????????????????continue?flag1;
????????????????}?else?{
?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

????I.A....?????23165??2009-03-26?12:06??StuDemo.java

-----------?---------??----------?-----??----

????????????????23165????????????????????1