package test;

public class Student {

    //创建成员变量

    String name = "";

    String code = "";

    String sex = "";

    double achievement;

    //构造函数

    public Student(String name)

    {

        this.name = name;

    }

    //初始化函数

    void set(String name, String code, String sex)

    {

        this.name = name;

        this.code = code;

        this.sex = sex;

    }

    //得到变量

    public String getname()

    {

        return name;

    }

    public String getcode()

    {

        return code;

    }

    public String getsex()

    {

        return sex;

    }

    //设置初始化

    public void setachi(double achievement)

    {

        this.achievement = achievement;

    }

    public double getachi()

    {

        return achievement;

    }

    public void print()

    {

        System.out.println("student:" + name + " code" + code + " sex" + sex);

    }

    public String tostring()

    {

        String infor = "student name: " + name + " code " + code + "sex" + sex;

        return infor;

    }

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        //new一个对象

        Student st1 = new Student("name1");

        Student st2 = new Student("name2");

        Student st3 = new Student("name3");

        Student st4 = new Student("name4");

        Student st5 = new Student("name5");

        Student st6 = new Student("name6");

        Student st7 = new Student("name7");

        Student st8 = new Student("name8");

        Student st9 = new Student("name9");

        Student st10 = new Student("name10");

        //设置一个学生类的对象数组，将所有的对象放到数组内

        Student[] st = new Student[]

                {st1,st2,st3,st4,st5,

                st6,st7,st8,st9,st10};

        //设置器

        st1.set("name1","1","man");

        st2.set("name2","2", "female");

        st3.set("name3","3", "man");

        st4.set("name4","4","man");

        st5.set("name5","5","female");

        st6.set("name6","6","male");

        st7.set("name7","7","female");

        st8.set("name7","7","male");

        st9.set("name8","8","female");

        st10.set("name10","10","female");

        System.out.println(st1.tostring());

        System.out.println(st2.tostring());

        System.out.println(st3.tostring());

        System.out.println(st4.tostring());

        System.out.println(st5.tostring());

        System.out.println(st6.tostring());

        System.out.println(st7.tostring());

        System.out.println(st8.tostring());

        System.out.println(st9.tostring());

        System.out.println(st10.tostring());

        st1.setachi(Math.random() * 100);

        st2.setachi(Math.random() * 100);

        st3.setachi(Math.random() * 100);

        st4.setachi(Math.random() * 100);

        st5.setachi(Math.random() * 100);

        st6.setachi(Math.random() * 100);

        st7.setachi(Math.random() * 100);

        st8.setachi(Math.random() * 100);

        st9.setachi(Math.random() * 100);

        st10.setachi(Math.random() * 100);

        st1.print();st2.print();st3.print();

        st4.print();st5.print();st6.print();

        st7.print();st8.print();st9.print();

        st10.print();

        for(int i = 0 ; i < st.length ; i++)

            for(int j = 0 ; j < st.length ; j++)

            {

                if(st[i].achievement < st[j].achievement)

                {

                    Student tmp;

                    tmp =  st[i];

                    st[i] = st[j];

                    st[j] = tmp;

                }

            }

        System.out.println("best grader is " + st[9].name + " grade: " +

        st[9].achievement + "sex is " + st[9].sex);

        System.out.println("lowest grader is " + st[9].name + " grade: " +

        st[9].achievement + "sex is " + st[9].sex);

    }

}