学生成绩管理系统-java-版

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1、/这个程序，可以完成基本的学生成绩管理，可以对学生增加，删除和按平均分排序等基本操作这个程序，可以完成基本的学生成绩管理，可以对学生增加，删除和按平均分排序等基本操作/希望下载的朋友们可以看懂，学到一点知识希望下载的朋友们可以看懂，学到一点知识packagepackage Student;publicpublic classclass Student privateprivate String id;/学号privateprivate String name;/姓名privateprivate intint engl;/英语成绩privateprivate intint math;/数学成绩p

2、rivateprivate intint comp;/计算机成绩privateprivate doubledouble aver;/平均分privateprivate Student students;/学生publicpublic staticstatic intint size=0;/人数Student();Student(String id,String name,intint engl,intint math,intint comp)size+;thisthis.id=id;thisthis.name=name;thisthis.engl=engl;thisthis.math=math

3、;p=comp;aver=average();publicpublic Student(Student s)thisthis.id=s.id;thisthis.name=newnew String(s.name);thisthis.engl=s.engl;thisthis.math=s.math;p=p;thisthis.aver=s.average();publicpublic voidvoid insertsort()/按平均分排序Student temp=newnew Student();forfor(intint i=0;i size;i+)forfor(intint j=0;j st

4、udentsj+1.aver)temp=studentsj;studentsj=studentsj+1;studentsj+1=temp;publicpublic Student getStudents()returnreturn students;publicpublic booleanboolean addStudent(Student addstudent)/增加学生/this.students=new Studentsize;booleanboolean flag=falsefalse;forfor(intint i=0;isize-1;i+)ifif(addstudent.id.eq

5、uals(studentsi.id)flag=truetrue;breakbreak;ifif(flag=falsefalse)studentssize-1=addstudent;returnreturn truetrue;elseelsereturnreturn falsefalse;publicpublic booleanboolean subStudent(String id)/按学号删除学生intint i;forfor(i=0;i size;i+)ifif(id.equals(studentsi.id)breakbreak;elseelsereturnreturn falsefals

6、e;intint top=i;forfor(intint j=top+1;j size;j+)studentsj-1=studentsj;size-;returnreturn truetrue;publicpublic voidvoid setStudents(Student students)thisthis.students=newnew Student100;forfor(intint i=0;i size;i+)thisthis.studentsi=newnew Student(studentsi);doubledouble average()returnreturn(engl+mat

7、h+comp)/3;String getId()returnreturn id;String getName()returnreturn name;intint getEnglish()returnreturn engl;intint getMath()returnreturn math;intint getComputer()returnreturn comp;doubledouble getAverage()returnreturn aver;intint getSize()returnreturn size;publicpublic voidvoid fanilize()size-;pu

8、blicpublic String toString()String s;s=+学号+t+姓名+t+英语+t+数学+t+计算机+t+平均分n;forfor(intint i=0;i size;i+)s=s+studentsi.getId()+t+studentsi.getName()+t +studentsi.getEnglish()+t+studentsi.getMath()+t+studentsi.getComputer()+t+studentsi.getAverage()+n;returnreturn s;packagepackage Student;importimport java.

9、util.*;publicpublic classclass textStudent/*paramparam args*/publicpublic staticstatic voidvoid main(String args)/TODOTODO Auto-generated method stub/ArrayList students=new ArrayList();/*Student students;students=new Student5;int i;for(i=0;i *5;i+)studentsi=new Student(getAStudent(i+1);Student*stu=n

10、ew Student();stu.setStudents(students);*System.out.print(stu);*System.out.print(增加学生);Student student1=newStudenti+1;*for(int j=0;j5;j+)student1j=studentsj;student1i=new*Student(getAStudent(i+1);stu.setStudents(student1);*System.out.println(添加成功);*/Student students;students=newnew Student3;intint i;

11、forfor(i=0;i 3;i+)studentsi=newnew Student(getAStudent(i+1);Student stu=newnew Student();stu.setStudents(students);intint n;Scanner Keyboard=newnew Scanner(System.in);/System.clear();dodo menu();System.out.println(请选择操作);n=Keyboard.nextInt();System.out.println(n);switchswitch(n)casecase 1:System.out

12、.println(增加学生);ifif(stu.addStudent(getAStudent(+i)System.out.print(n添加成功);elseelse System.out.print(已经有此学号了，添加失败);i-;breakbreak;casecase 2:System.out.print(输入要删除的学生学号：);String str=Keyboard.next();ifif(stu.subStudent(str)System.out.println(删除成功);i-;elseelseSystem.out.print(没有找到,删除失败a);breakbreak;case

13、case 3:System.out.println(所有学生的信息：+共+Student.size+人);System.out.println(stu);breakbreak;casecase 4:System.out.print(按平均分排序，);stu.insertsort();System.out.println(排序后的结果：);System.out.print(stu);breakbreak;casecase 0:System.out.println(成功退出);breakbreak;defaultdefault:System.out.println(输入错误，请从新输入);brea

14、kbreak;whilewhile(n!=0);staticstatic Student getAStudent(intint i)Scanner Keyboard=newnew Scanner(System.in);Student studenti;System.out.println(输入第+i+个学生的信息:);System.out.print(学号:);String id=Keyboard.next();System.out.print(姓名:);String name=Keyboard.next();System.out.print(英语成绩:);intint eng=Keyboar

15、d.nextInt();System.out.print(数学成绩:);intint math=Keyboard.nextInt();System.out.print(计算机成绩:);intint comp=Keyboard.nextInt();studenti=newnew Student(id,name,eng,math,comp);returnreturn studenti;staticstatic voidvoid menu()System.out.println(n);System.out.println(1.增加学生);System.out.println(2.删除学生);System.out.println(3.显示所有学生的信息);System.out.println(4.按平均分排序);System.out.println(0.退出);