[JAVA] 성적 처리

성적 처리

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package Test2;

import java.util.Scanner;

 

class Name{

    //학생 이름 정보

    Name(){}

    private String name;

 

    public String getName() {return name;}

    public void setName(String name) {this.name = name;}

}

class Score{

    //국영수 점수

    Score(){}

    private int kor,eng,math;

 

    public int getKor() {return kor;}

    public void setKor(int kor) {this.kor = kor;}

 

    public int getEng() {return eng;}

    public void setEng(int eng) {this.eng = eng;}

 

    public int getMath() {return math;}

    public void setMath(int math) {this.math = math;}

}

class Student{

    //has - a, Name,Score 클래스를 가지고 있어야 함

    Name name;

    Score score;

    int total;

    double avg;

    Student(){

        name = new Name();

        score = new Score();

    }

    //합계, 평균

    int getSum() {

        total = score.getKor() + score.getEng() + score.getMath();

        return total;

    }

    double getAvg() {

        avg = total / 3.0; 

        return avg;

    }

    

    @Override    //toString 오버라이드 해줘서 전체 출력

    public String toString() {

        return "이름: "+name.getName()+

                "국어: "+score.getKor()+

                "영어: "+score.getEng()+

                "수학: "+score.getMath()+

                "총점: "+this.getSum()+

                "평균: "+this.getAvg()+"\n";

    }

     

    /* toStirng으로 배운것 써먹자

     * public String printAll() {

        return "이름: "+name.getName()+

                "국어: "+score.getKor()+

                "영어: "+score.getEng()+

                "수학: "+score.getMath()+

                "총점: "+this.getSum()+

                "평균: "+this.getAvg()+"\n";

    }*/

 

}

 

 

 

public class Grades {

    public static void main(String[] args) {

        //1.입력  2.출력  3.검색  4.수정  5.삭제

        int i=0;

        int num=0;

        int j;

        int move;

        String search;

        Student[] student = new Student[50];//Student 배열 선언

        Scanner scanner = new Scanner(System.in);

        /*for(int k=0; k<student.length; k++) {

            student[k] = new Student();

        } 객체를 왜 전체 안만드는지 */

        while(num != 6) {

            System.out.println("1.입력  2.출력  3.검색  4.수정  5.삭제  6.종료");

            num = scanner.nextInt();

            switch(num) {

            case 1:

                student[i] = new Student();    //객체 생성

                System.out.println("이름 입력 : " );

                student[i].name.setName(scanner.next());    //입력

                System.out.println("국어점수 입력 : " );

                student[i].score.setKor(scanner.nextInt());

                System.out.println("영어점수 입력 : " );

                student[i].score.setEng(scanner.nextInt());

                System.out.println("수학점수 입력 : " );

                student[i].score.setMath(scanner.nextInt());

                i++;//다음 배열 칸으로 넘어가기 위해

                break;

            case 2:

                /*for(int j=0; j<student.length; j++) {

                    System.out.println(student[j].printAll());

                }객체를 다 생성 하고 실행시  -> string: null, int : 0/ */

                Student temp;

                

                for (int k = 0; k < i-1; k++) {

                    for (int k2 = 0; k2 < i-1; k2++) {

                        if (student[k2].getSum() < student[k2+1].getSum()) {

                            temp = student[k2];

                            student[k2] = student[k2+1];

                            student[k2+1] = temp;

                        }

                    }

                }

                for (int t = 0; t < i; t++) {

                    System.out.println(student[t].toString());

                }

                break;

            case 3:

                System.out.println("검색할 사람 : ");

                search = scanner.next();

                for ( j = 0; j < i; j++) {

                    if(student[j].name.getName().equals(search)) {

                        break; //

                    }

                }

                System.out.println(student[j].toString());

                break;                                                

            case 4:

                System.out.println("수정 할 사람 : ");

                search = scanner.next();

                for ( j = 0; j < i; j++) {

                    if(student[j].name.getName().equals(search)) {

                        break;

                    }

                }

                System.out.println("수정 할 과목 : 1.국어 2.영어 3.수학 : ");

                int subjectSujung = scanner.nextInt();

                if(subjectSujung==1) {

                    System.out.println("국어 점수 수정 : ");

                    student[j].score.setKor(scanner.nextInt());

                }else if(subjectSujung==2) {

                    System.out.println("영어 점수 수정 : ");

                    student[j].score.setEng(scanner.nextInt());

                }else if(subjectSujung==3){

                    System.out.println("수학 점수 수정");

                    student[j].score.setMath(scanner.nextInt());

                }else {

                    System.out.println("잘못된 입력");

                }

                break;

            case 5:

                System.out.println("삭제 할 대상 : ");

                search = scanner.next();

                for (j = 0; j < i; j++) {

                

                    if(student[j].name.getName().equals(search)) {

                        break;    

                    }

                }

                

                for(move = j; move<i; move++) {

                    student[move] = student[move+1];

                }

                student[i-1] = null;

                i--;    //널 나오지 않게

                break;

            case 6:

                System.out.println("종료");

                break;

            }

        }

 

    }

}