[14기] 김민제 과제 제출합니다

src/main/java/gpacalc/Application.java

@@ -1,7 +1,146 @@
 package gpacalc;
 
+import java.util.ArrayList;
+import static camp.nextstep.edu.missionutils.Console.readLine;
+import camp.nextstep.edu.missionutils.Console;
+
 public class Application {
+    //질문 및 입력받는 함수
+    public static String inputValue(String question){
+        System.out.println(question);
+        return Console.readLine();
+    }
+
+    //항목에 맞게 스필릿 후 저장
+    public static void addSubjects(ArrayList<Gpa> list, String input, String majorType) {
+        if(input == null || input.isEmpty()){
+            throw new IllegalArgumentException("input is empty");
+        }
+
+        String[] subjects;
+        if(input.contains(",")){
+            subjects = input.split(",");
+        }
+        else{
+            subjects = new String[]{input};
+        }
+
+        for (String subject : subjects) {
+            String[] parts = subject.split("-");
+            if (parts.length != 3) {
+                throw new IllegalArgumentException("subject part's number must be 3");
+            }
+
+            //className 유효성 검사
+            String className = parts[0].trim();
+
+            // credit 유효성 검사
+            String creditString = parts[1].trim();
+            int credit;
+            try {
+                credit = Integer.parseInt(creditString);
+            } catch (NumberFormatException e) {
+                throw new IllegalArgumentException("credit part must be an integer");
+            }
+            if (credit < 1 || credit > 4) {
+                throw new IllegalArgumentException("credit part must be an integer at 1 to 4");
+            }
+
+            //gradeSymbol 유효성 검사
+            String gradeSymbol = parts[2].trim();
+            if (!Gpa.Grade.isValid(gradeSymbol)) {
+                throw new IllegalArgumentException("gradeSymbol is invalid: " + gradeSymbol);
+            }
+
+            list.add(new Gpa(className, credit, gradeSymbol, majorType));
+        }
+    }
+
+    //전체 credit 구하기
+    public static int earnedCredits(ArrayList<Gpa> gpaList) {
+        int allCredit = 0;
+        for (Gpa gpa : gpaList) {
+            if (gpa.getGrade().equals("F") || gpa.getGrade().equals("NP")) {
+                continue;
+            }
+
+            allCredit += gpa.getCredit();
+        }
+        return allCredit;
+    }
+
+    //전체 평균 grade 구하기
+    public static double averageGrade(ArrayList<Gpa> gpaList) {
+        double allWeightedScore = 0;
+        int allCredits = 0;
+
+        for (Gpa gpa : gpaList) {
+            if (gpa.getGrade().equals("P") || gpa.getGrade().equals("NP")) {
+                continue;
+            }
+
+            double gradePoint = gpa.getGradePoint();
+            int credit = gpa.getCredit();
+
+            allWeightedScore += (gradePoint * credit);
+            allCredits += credit;
+        }
+
+        if (allCredits == 0) return 0.0;
+
+        return allWeightedScore / allCredits;
+    }
+
+    //전공 평균 grade 구하기
+    public static double majorAverageGrade(ArrayList<Gpa> gpaList) {
+        double allMajorWeightedScore = 0;
+        int allMajorCredits = 0;
+        for (Gpa gpa : gpaList) {
+            if (gpa.getGrade().equals("P") || gpa.getGrade().equals("NP") || gpa.getMajor().equals("[교양]")) {
+                continue;
+            }
+
+            double gradePoint = gpa.getGradePoint();
+            int credit = gpa.getCredit();
+
+            allMajorWeightedScore += (gradePoint * credit);
+            allMajorCredits += credit;
+        }
+        if (allMajorCredits == 0) return 0.0;
+        return allMajorWeightedScore / allMajorCredits;
+    }
+
     public static void main(String[] args) {
-        //TODO: 구현
+        ArrayList<Gpa> gpaList = new ArrayList<>();
+        // 전공 입력
+        String inputMajor = inputValue("전공 과목명과 이수학점, 평점을 입력해주세요(예시: 프로그래밍언어론-3-A+,소프트웨어공학-3-B+): ");
+        addSubjects(gpaList, inputMajor, "[전공]");
+        System.out.println();
+
+        // 교양 입력
+        String inputGeneralEducation = inputValue("교양 과목명과 이수학점, 평점을 입력해주세요(예시: 선형대수학-3-C0,인간관계와자기성장-3-P): ");
+        addSubjects(gpaList, inputGeneralEducation, "[교양]");
+        System.out.println();
+
+        // 과목목록 출력
+        System.out.println("<과목 목록>");
+        for (Gpa gpa : gpaList) {
+            System.out.println(gpa.toString());
+        }
+        System.out.println();
+
+        // 취득학점 출력
+        System.out.println("<취득학점>");
+        System.out.println(earnedCredits(gpaList) + "학점");
+        System.out.println();
+
+        // 평점평균 출력
+        System.out.println("<평점평균>");
+        System.out.println(String.format("%.2f", averageGrade(gpaList)) + " / 4.5");
+        System.out.println();
+
+        // 전공 평점평균 출력
+        System.out.println("<전공 평점평균>");
+        System.out.println(String.format("%.2f", majorAverageGrade(gpaList)) + " / 4.5");
     }
 }

src/main/java/gpacalc/Gpa.java

@@ -0,0 +1,97 @@
+package gpacalc;
+
+public class Gpa {
+    private String className;
+    private int credit;
+    private String grade;
+    private String major;
+
+    //grade enum
+    public enum Grade {
+        A_PLUS("A+", 4.5),
+        A0("A0", 4.0),
+        B_PLUS("B+", 3.5),
+        B0("B0", 3.0),
+        C_PLUS("C+", 2.5),
+        C0("C0", 2.0),
+        D_PLUS("D+", 1.5),
+        D0("D0", 1.0),
+        F("F", 0.0),
+        P("P", 0.0),
+        NP("NP", 0.0);
+
+        private final String symbol; // 성적 예시 (A+)
+        private final double point;  // 점수 예시 (4.5)
+
+        Grade(String symbol, double point) {
+            this.symbol = symbol;
+            this.point = point;
+        }
+
+        public static boolean isValid(String inputSymbol) {
+            for (Grade g : Grade.values()) {
+                if (g.symbol.equals(inputSymbol)) {
+                    return true; // 목록에 있으면 유효함
+                }
+            }
+            return false; // 없으면 무효함
+        }
+
+        public static double getPointBySymbol(String inputSymbol) {
+            for (Grade g : Grade.values()) {
+                if (g.symbol.equals(inputSymbol)) {
+                    return g.point;
+                }
+            }
+            return 0.0;
+        }
+    }
+
+    //constructor
+    public Gpa(String className, int credit, String grade, String major) {
+        this.className = className;
+        this.credit = credit;
+        this.grade = grade;
+        this.major = major;
+    }
+
+    //getter & setter
+    public double getGradePoint() {
+        return Grade.getPointBySymbol(grade);
+    }
+
+    public String getClassName() {
+        return className;
+    }
+    public void setClassName(String className) {
+        this.className = className;
+    }
+
+    public int getCredit() {
+        return credit;
+    }
+    public void setCredit(int credit) {
+        this.credit = credit;
+    }
+
+    public String getGrade() {
+        return grade;
+    }
+    public void setGrade(String grade) {
+        this.grade = grade;
+    }
+
+    public String getMajor() {
+        return major;
+    }
+    public void setMajor(String major) {
+        this.major = major;
+    }
+
+    //toString
+    @Override
+    public String toString() {
+        // 형식: [전공] 과목명,학점,성적
+        return major + " " + className + "," + credit + "," + grade;
+    }
+}