import java.util.Scanner;
public class Main {
public static void main(String[] args) {
int kor = 100; // 국어
int mat = 100; // 수학
int sci = 100; // 과학
int eng = 100; // 영어
boolean isFinish = false;
String key = "";
Scanner scan = new Scanner(System.in);
// 1 번째 묻기
System.out.println("어느 과목을 변경할래?");
key = scan.nextLine();
if (key.equals("국어")) {
System.out.println("현재 점수: " + kor);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
kor = Integer.parseInt(key);
} else if (key.equals("영어")) {
System.out.println("현재 점수: " + eng);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
eng = Integer.parseInt(key);
} else if (key.equals("수학")) {
System.out.println("현재 점수: " + mat);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
mat = Integer.parseInt(key);
} else if (key.equals("과학")) {
System.out.println("현재 점수: " + sci);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
sci = Integer.parseInt(key);
} else if (key.equals("exit")) {
isFinish = true;
}
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
if (isFinish == false) {
// 2 번째 묻기
System.out.println("어느 과목을 변경할래?");
key = scan.nextLine();
if (key.equals("국어")) {
// 곱해주세요
System.out.println("현재 점수: " + kor);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
kor = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
} else if (key.equals("영어")) {
System.out.println("현재 점수: " + eng);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
eng = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
} else if (key.equals("수학")) {
System.out.println("현재 점수: " + mat);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
mat = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
} else if (key.equals("과학")) {
System.out.println("현재 점수: " + sci);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
sci = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
}else if(key.equals("exit")) {
isFinish = true;
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
}
}
if (isFinish == false) {
// 3번째 묻기
System.out.println("어느 과목을 변경할래?");
key = scan.nextLine();
if (key.equals("국어")) {
// 곱해주세요
System.out.println("현재 점수: " + kor);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
kor = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
} else if (key.equals("영어")) {
System.out.println("현재 점수: " + eng);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
eng = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
} else if (key.equals("수학")) {
System.out.println("현재 점수: " + mat);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
mat = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
} else if (key.equals("과학")) {
System.out.println("현재 점수: " + sci);
System.out.println("변경할 점수 입력해라");
key = scan.nextLine();
sci = Integer.parseInt(key);
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
}else if(key.equals("exit")) {
isFinish = true;
System.out.println("총점: " + (kor + mat + eng + sci));
System.out.println("평균: " + (kor + mat + eng + sci) / 4);
}
}
}
}
