java之day4补充

传对象

 

Student

package day41;

public class Student {
    int math;
    int chinese;
    int english;

    public Student(int math, int chinese, int english) {
        this.chinese = chinese;
        this.math = math;
        this.english = english;
    }
}

StudentCalc

package day41;

public class StudentCalc {
    double avg(Student student) {
        int chineseScore = student.chinese;
        int englishScore = student.english;
        int mathScore = student.math;
        int sum = student.chinese + student.math + student.english;
        return sum / 3;
    }
}

StudentTest

package day41;

public class StudentTest {
    public static void main(String[] args) {
        // 生成一个学生
        Student student = new Student(60, 70, 80);
        // 生成一个计算学生成绩的对象
        StudentCalc calc = new StudentCalc();
        double avg = calc.avg(student);
        System.out.println(avg);
    }
}

 

 

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Student

package day42;

public class Student {

    int height;

    public Student() {
    }

    public Student(int height) {
        this.height = height;
    }

}

StudentCalc

package day42;

public class StudentCalc {
    public double avg(Student[] students) {
        int sum = 0;
        for (int i = 0; i < students.length; i++) {
            sum += students[i].height;
        }
        return sum / 5;
    }

}

StudentTest

package day42;

import java.util.Scanner;

public class StudentTest {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Student[] student = new Student[5];
        for (int i = 0; i < 5; i++) {
            System.out.println("请输入第" + (i + 1) + "个学生身高：");
            int height1 = scanner.nextInt();
            student[i] = new Student();
            student[i].height = height1;
        }

        StudentCalc calc = new StudentCalc();
        double avg = calc.avg(student);
        System.out.println(avg);

    }

}