PTA Java 实现学生选修课成绩统计

import java.util.Scanner;

public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); String[] students = input.nextLine().split(','); StringBuilder result = new StringBuilder();

    for (String student : students) {
        String[] info = student.trim().split(' ');
        String name = info[0];
        String grade1 = info[1];
        String grade2 = info[2];

        int score1 = convertToScore(grade1);
        int score2 = convertToScore(grade2);
        int totalScore = score1 + score2;

        result.append(name).append(' ').append(totalScore).append(',');
    }

    result.deleteCharAt(result.length() - 1); // remove the last comma
    System.out.println(result.toString());
}

public static int convertToScore(String grade) {
    if (grade.equals('A')) {
        return 5;
    } else if (grade.equals('B')) {
        return 4;
    } else if (grade.equals('C')) {
        return 3;
    } else if (grade.equals('D')) {
        return 2;
    } else if (grade.equals('E')) {
        return 1;
    } else {
        return 0;
    }
}

}