[12기] 김승환 과제 제출합니다.

build.gradle

@@ -15,4 +15,8 @@ dependencies {
 
 test {
     useJUnitPlatform()
-}
+}
+
+tasks.withType(JavaCompile){
+    options.encoding = "UTF-8"
+}

docs/README.md

@@ -0,0 +1,13 @@
+## 프로그램 진행 순서 ##
+1. 전공 과목 정보 입력
+2. 교양 과목 정보 입력
+3. 과목 목록 출력
+4. 취득 학점 출력
+5. 평점 평균 줄력
+6. 전공 평점 평균 출력
+
+## 구현 기능 ##
+
+1. 입력 받은 내용을 과목명, 학점, 성적으로 구분하여 배열에 저장
+2. 입력 받은 내용을 기반으로 취득 학점 계산
+3. 전공, 교양에 맞춰 평점 평균 구하는 기능 구현

src/main/java/gpacalc/Application.java

@@ -1,7 +1,32 @@
 package gpacalc;
 
+import camp.nextstep.edu.missionutils.Console;
+
 public class Application {
     public static void main(String[] args) {
-        //TODO: 구현
+        Method method = new Method();
+
+        System.out.println("전공 과목명과 이수학점, 평점을 입력해주세요(예시: 프로그래밍언어론-3-A+,소프트웨어공학-3-B+):");
+        String major = Console.readLine();
+        System.out.println("교양 과목명과 이수학점, 평점을 입력해주세요(예시: 선형대수학-3-C0,인간관계와자기성장-3-P):");
+        String liberal = Console.readLine();
+
+        System.out.println("<과목 목록>");
+        method.categorize(major, "전공");
+        method.categorize(liberal, "교양");
+        System.out.println();
+
+        int credit = method.getCredit(major) + method.getCredit(liberal);
+        System.out.println("<취득학점>");
+        System.out.println(credit + "학점\n");
+
+        System.out.println("<평점평균>");
+        System.out.println(method.calculate(major + "," + liberal ,credit) + " / 4.5\n");
+
+        System.out.println("<전공 평점평균>");
+        System.out.println(method.calculate(major, method.getCredit(major)) + " / 4.5\n");
+
+        return;
     }
 }
+

src/main/java/gpacalc/CheckException.java

@@ -0,0 +1,30 @@
+package gpacalc;
+
+public class CheckException {
+	public void checkSubjectLength(String subject) {
+		if (checkBlank(subject) || checkMaxName(subject)){
+			throw new IllegalArgumentException();
+		}
+	}
+
+	public boolean checkMaxName(String subject){
+		int maxNameLength = 10;
+		return maxNameLength < subject.length();
+	}
+
+	public boolean checkBlank(String subject){
+		return subject.isBlank();
+	}
+
+	public void checkGradeRange(String Grade){
+		if(Grade.equals("A+") || Grade.equals("A0") || Grade.equals("B+") || Grade.equals("B0") || Grade.equals("C+") || Grade.equals("C0") || Grade.equals("D+") || Grade.equals("D0") || Grade.equals("F") || Grade.equals("P") || Grade.equals("NP") ) return;
+		throw new IllegalArgumentException();
+	}
+
+	public void checkCreditRange(int subject_credit){
+		int minCredit = 1,maxCredit = 4;
+		if (subject_credit < minCredit|| maxCredit < subject_credit)
+			throw new IllegalArgumentException("학점을 확인해주세요.");
+	}
+
+}

src/main/java/gpacalc/Method.java

@@ -0,0 +1,77 @@
+package gpacalc;
+
+public class Method {
+	CheckException checking = new CheckException();
+
+	public void categorize(String subjects, String major_liberal) {
+		String[] first_split = subjects.split(",");
+		String[][] second_split = new String[first_split.length][3];
+		for (int i = 0; i < first_split.length; i++)	second_split[i] = first_split[i].split("-");
+
+		for (int i = 0; i < first_split.length; i++) {
+			checking.checkSubjectLength(second_split[i][0]);
+			checking.checkGradeRange(second_split[i][2]);
+
+			System.out.print("[" + major_liberal + "] ");
+			for (int j = 0; j < 3; j++) {
+				System.out.print(second_split[i][j]);
+				if (j != 2) System.out.print(",");
+			}
+			System.out.println();
+		}
+	}
+
+	public int getCredit(String input) {
+		int credit = 0;
+		String[] first_split = input.split(",");
+		String[][] second_split = new String[first_split.length][3];
+		for (int i = 0; i < first_split.length; i++) second_split[i] = first_split[i].split("-");
+
+		for (String[] strings : second_split) {
+			int subject_credit = Integer.parseInt(strings[1]);
+			checking.checkCreditRange(subject_credit);
+
+			if (strings[2].equals("F") || strings[2].equals("NP")) continue;
+			credit += Integer.parseInt(strings[1]);
+		}
+		return credit;
+	}
+
+	public static double calculate(String subjects, int credit){
+		String[] first_split = subjects.split(",");
+		String[][] second_split = new String[first_split.length][3];
+		for(int i = 0 ; i < first_split.length ; i++) 	second_split[i] = first_split[i].split("-");
+
+		double sum = 0;
+		for(int i = 0 ; i < first_split.length ; i++) {
+			if(second_split[i][2].equals("P")) credit -= Integer.parseInt(second_split[i][1]);
+			if(second_split[i][2].equals("F")) credit += Integer.parseInt(second_split[i][1]);
+			sum += (Double.parseDouble(second_split[i][1]) * Matching(second_split[i][2]));
+		}
+
+		double result = sum / credit;
+		result = Math.round(result*100) / (double)100 ;
+
+		return result;
+	}
+
+	public static double Matching(String grade){
+		double score = 0;
+		switch(grade){
+			case "A+" -> score = 4.5;
+			case "A0" -> score = 4.0;
+			case "B+" -> score = 3.5;
+			case "B0" -> score = 3.0;
+			case "C+" -> score = 2.5;
+			case "C0" -> score = 2.0;
+			case "D+" -> score = 1.5;
+			case "D0" -> score = 1.0;
+			case "F" -> score = 0;
+			case "P" -> score = 0;
+			case "NP" -> score = 0;
+			default -> throw new IllegalArgumentException("잘못된 입력입니다.");
+		}
+		return score;
+	}
+
+}

src/test/java/ApplicationTest.java

@@ -10,22 +10,22 @@ public class ApplicationTest extends NsTest {
     @Test
     void 평점평균_계산() {
         run("데이타구조-3-A0,자바프로그래밍언어-3-B+,컴퓨터구조-3-C0,컴퓨터네트워크-3-D+",
-                "미술의이해-3-P,교양특론3-1-NP,기독교의이해-2-F");
+            "미술의이해-3-P,교양특론3-1-NP,기독교의이해-2-F");
         assertThat(output()).contains(
-                "<과목 목록>",
-                "[전공] 데이타구조,3,A0",
-                "[전공] 자바프로그래밍언어,3,B+",
-                "[전공] 컴퓨터구조,3,C0",
-                "[전공] 컴퓨터네트워크,3,D+",
-                "[교양] 미술의이해,3,P",
-                "[교양] 교양특론3,1,NP",
-                "[교양] 기독교의이해,2,F",
-                "<취득학점>",
-                "15학점",
-                "<평점평균>",
-                "2.36 / 4.5",
-                "<전공 평점평균>",
-                "2.75 / 4.5"
+            "<과목 목록>",
+            "[전공] 데이타구조,3,A0",
+            "[전공] 자바프로그래밍언어,3,B+",
+            "[전공] 컴퓨터구조,3,C0",
+            "[전공] 컴퓨터네트워크,3,D+",
+            "[교양] 미술의이해,3,P",
+            "[교양] 교양특론3,1,NP",
+            "[교양] 기독교의이해,2,F",
+            "<취득학점>",
+            "15학점",
+            "<평점평균>",
+            "2.36 / 4.5",
+            "<전공 평점평균>",
+            "2.75 / 4.5"
         );
     }
 

src/test/java/gpacalc/ApplicationTest.java

@@ -0,0 +1,46 @@
+package gpacalc;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+class ApplicationTest {
+	Method method = new Method();
+	CheckException checkException = new CheckException();
+
+	@Test
+	void checkSubjectLength() {
+		Exception exception = assertThrows(IllegalArgumentException.class, () ->
+			checkException.checkSubjectLength(" ")
+		);
+	}
+
+	@Test
+	void checkGradeRange() {
+		Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+			checkException.checkGradeRange("E0");
+			}
+		);
+	}
+
+	@Test
+	void checkCreditRange() {
+		Exception exception = assertThrows(IllegalArgumentException.class, () -> {
+			checkException.checkCreditRange(0);
+			}
+		);
+
+		Exception exception1 = assertThrows(IllegalArgumentException.class, () -> {
+			checkException.checkCreditRange(5);
+			}
+		);
+	}
+
+	@Test
+	void calculate() {
+		assertThat(method.calculate("데이타구조-3-A0,자바프로그래밍언어-3-B+,컴퓨터구조-3-C0,컴퓨터네트워크-3-D+,미술의이해-3-P,교양특론3-1-NP,기독교의이해-2-F", 15)).as("계산에 오류가 있습니다.").isEqualTo(2.36);
+	}
+}