这里有一个类
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实现学生学号，数学，语文，英语成绩录入
并且计算平均成绩，按照平均成绩高低输出信息
你可以改改！
//实现简单的学生信息输入输出和初步的成绩排序
public
class
student
{
private
int
id;
//学号
private
int
mathscore;
//数学成绩
private
int
chinscore;
//语文成绩
private
int
forescore;
//外语成绩
public
student()
{
id
=
0;
mathscore
=
0;
chinscore
=
0;
forescore
=
0;
}
public
student(int
newid,
int
newmathscore,
int
newchinsvore,
int
newforescore)
{
id
=
newid;
mathscore
=
newmathscore;
chinscore
=
newchinsvore;
forescore
=
newforescore;
}
public
double
getaveragescore()
{
//求平均成绩
double
averagescore
=
((double)
mathscore
+
chinscore
+
forescore)
/
3;
return
averagescore;
}
public
void
output(student
student)
{
//输出对象的内容
system.out.println("
"
+
student.id
+
"
"
+
student.mathscore
+
"
"
+
student.chinscore
+
"
"
+
student.forescore
+
"
"
+
student.getaveragescore());
}
public
int
max(student
a[],
int
n)
{
//student类对象数组的前n项中的成绩最大值的索引
int
position
=
0;
for
(int
i
=
1;
i
n;
i++)
{
if
(a[i].getaveragescore()
a[position].getaveragescore())
{
//比较平均成绩
position
=
i;
}
}
return
position;
}
public
void
selectsort(student
a[])
{
//student类对象数组的选择排序
for
(int
n
=
a.length;
n
1;
n--)
{
int
i
=
max(a,
n);
student
temp
=
a[i];
a[i]
=
a[n
-
1];
a[n
-
1]
=
temp;
}
}
}
这里有一个类
实现学生学号，数学，语文，英语成绩录入
并且计算平均成绩，按照平均成绩高低输出信息
你可以改改！
//实现简单的学生信息输入输出和初步的成绩排序
public class Student {
private int id; //学号
private int mathScore; //数学成绩
private int chinScore; //语文成绩
private int foreScore; //外语成绩
public Student() {
id = 0;
mathScore = 0;
chinScore = 0;
foreScore = 0;
}
public Student(int newId, int newMathScore, int newChinSvore,
int newForeScore) {
id = newId;
mathScore = newMathScore;
chinScore = newChinSvore;
foreScore = newForeScore;
}
public double getAverageScore() { //求平均成绩
double averageScore = ((double) mathScore + chinScore + foreScore) / 3;
return averageScore;
}
public void output(Student student) { //输出对象的内容
System.out.println(" " + student.id + " " + student.mathScore +
" " + student.chinScore + " "
+ student.foreScore + " " +
student.getAverageScore());
}
public int max(Student a[], int n) { //Student类对象数组的前n项中的成绩最大值的索引
int position = 0;
for (int i = 1; i n; i++) {
if (a[i].getAverageScore() a[position].getAverageScore()) { //比较平均成绩
position = i;
}
}
return position;
}
public void selectSort(Student a[]) { //Student类对象数组的选择排序
for (int n = a.length; n 1; n--) {
int i = max(a, n);
Student temp = a[i];
a[i] = a[n - 1];
a[n - 1] = temp;
}
}
}
import java.util.Scanner;\x0d\x0a public class Student{\x0d\x0a public static void main(String[] args){\x0d\x0a Scanner sc = new Scanner(System.in);\x0d\x0a System.out.println("请输入学生的人数....");\x0d\x0a int num = sc.nextInt();\x0d\x0a int[] arr = new int[num];\x0d\x0a double[] chengji_arr = new double[num]; //存放成绩的\x0d\x0a String[] String_arr = new String[num]; //存放姓名的\x0d\x0a String chengjis = "";\x0d\x0a String names = "";\x0d\x0a for(int i = 0; i
回答于 2022-11-16
import java.util.ArrayList;
import java.util.Scanner;import com.sun.org.apache.xpath.internal.Arg;
public class Student {
//两个私有属性
private int no ;
private String name ;
//默认构造函数
public Student(){}
//带参构造函数
public Student(int no,String name){
this.no=no;
this.name=name;
}
//添加学生信息
public void addStudentInfo(ArrayList list){
String flag1="yes";
do{
Student student=new Student();
Scanner in =new Scanner(System.in);
System.out.println("请输入学生学号：");
student.setNo(in.nextInt());
System.out.println("请输入学生姓名：");
student.setName(in.next());
list.add(student);
System.out.println("是否继续添加学生信息(yes/no)?");
flag1=in.next();
} while(flag1.equals("yes"));
}
//读取学生信息
public void showStudentInfo(ArrayListStudent list){
System.out.println(" 学生no： "+" 学生name: ");
for(Student student:list){
System.out.println(" "+student.getNo()+" "+student.getName());
}
}
public int getNo() {
return no;
}
public void setNo(int no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public static void main(String arg[]) {
ArrayListStudent studentList= new ArrayListStudent();
Student student= new Student();
Scanner inn= new Scanner(System.in);
while(true){
System.out.println("----------------- 欢迎使用学生管理系统------------------");
System.out.println("1.输入学生信息");
System.out.println("2.显示学生信息");
System.out.println("0.退出系统");
System.out.println("请选择....");
int nn= inn.nextInt();
switch (nn) {
case 1:
student.addStudentInfo(studentList);
break;
case 2:
System.out.println("学生信息如下：");
student.showStudentInfo(studentList);
break;
case 0:
System.exit(0);
System.out.println("系统退出！");
break;
default:
break;
}
}
} }
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