题目集1-3的总结Blog

import java.util.Scanner;
class Student {
    private String stuId;
    private String name;
    private int chinese;
    private int math;
    private int physics;
    public Student(String stuId, String name, int chinese, int math, int physics) {
        this.stuId = stuId;
        this.name = name;
        this.chinese = chinese;
        this.math = math;
        this.physics = physics;
    }
    public int getTotalScore() {
        return chinese + math + physics;
    }
    // 计算平均分
    public double getAverageScore() {
        return getTotalScore() / 3.0;
    }
    // 获取学生信息
    public String getStudentInfo() {
        return stuId + " " + name;
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Student[] stu = new Student[5];
        //记录学生信息
        for (int i = 0; i < 5; i++) {
            String line = scanner.nextLine();
            String[] info = line.split(" ");
            String studentId = info[0];
            String name = info[1];
            int chinese = Integer.parseInt(info[2]);
            int math = Integer.parseInt(info[3]);
            int physics = Integer.parseInt(info[4]);
            stu[i] = new Student(studentId, name, chinese, math, physics);
        }
        //分析过后的学生成绩信息
        for (int i = 0; i < 5; i++) {
            Student student = stu[i];
            //get学生信息，输出总分和三科的平均分
            String output = student.getStudentInfo() + " " + student.getTotalScore() + " " + String.format("%.2f", student.getAverageScore());
            System.out.println(output);
        }
        scanner.close();
    }
}

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        int i, j;
        int arrayLength = 3;
        Student[] stu = new Student[arrayLength];
        Score[][] scores = new Score[arrayLength][arrayLength];
        for (i = 0; i < arrayLength; i++){
            stu[i] = new Student();
        }
        for (i = 0; i < arrayLength; i++){
            for (j = 0; j < arrayLength; j++){
                scores[i][j] = new Score();
            }
        }
        double a = 0, b = 0, c = 0;
        int[] n1 = new int[arrayLength];
        int[] n2 = new int[arrayLength];
        int[] n3 = new int[arrayLength];
        for (i = 0; i < arrayLength; i++){
            for (j = 0; j < arrayLength; j++){
                stu[i].ID = input.next();
                stu[i].name = input.next();
                String lesson = input.next();
                scores[i][j].regularscore = input.nextInt();
                scores[i][j].finalscore = input.nextInt();
                a += scores[i][j].finalscore();
                b += scores[i][j].regularscore;
                c += scores[i][j].finalscore;
            }
            n1[i] = (int) a;//总分
            n2[i] = (int) b;//平时分
            n3[i] = (int) c;//期末分
            a = 0;
            b= 0;
            c = 0;
        }
        for (i = 0; i < arrayLength; i++){
            System.out.printf("%s %s %d %.2f %.2f %.2f\n", stu[i].getID(), stu[i].getName(), n1[i], n2[i] / 3.0, n3[i] / 3.0, n1[i] / 3.0);
        }
    }



    public static class Score{
        private int regularscore;
        private int finalscore;
        public int finalscore(){
            return (int) (regularscore * 0.4 + finalscore * 0.6);
        }
        public Score(int regularscore, int finalscore){
            this.finalscore = finalscore;
            this.regularscore = regularscore;
        }
        public Score(){
            this(0, 0);//初始化平时成绩和期末成绩
        }
    }
    public static class Student{
        private String ID;
        private String name;
        private int chinese;
        private int math;
        private int physics;
        public Student(String ID, String name, int chinese, int math, int physics){
            this.ID = ID;
            this.name = name;
            this.chinese = chinese;
            this.math = math;
            this.physics = physics;
        }
        public Student(){
            this("", "", 0, 0, 0);//学生信息
        }
        public String getID(){
            return ID;
        }
        public String getName(){
            return name;
        }
        public int getChinese(){
            return chinese;
        }
        public int getMath(){
            return math;
        }
        public int getPhysics(){
            return physics;
        }
        public int getTotal(){
            return chinese + math + physics;
        }
        public double getAverage(){
            return getTotal() / 3.0;
        }
    }
}