Online-1

package one;

public class One
{
    public static void main(String[] args)
    {
        Two tw = new Two();
        Two tw1 = new Two("alvi","01761900889",20.00,5000.00,1.00);
        Three th = new Three();
        Three th1 = new Three("alvi","01761900889",20.00,5000.00,1.00);

        /* set using setter and getter method */
        /*
        tw.setname("alvi");
        tw.setmobno("01761900889");
        tw.setage(20.00);

        tw.setbasic(5000); // FOR TWO CLASS
        th.setbasic(5000); // FOR THREE CLASS

        // IF WE DONT USE tw.setbasic(); and th.setbasic(); two times
        // THE VALUE OF BASIC WONT BE CHANGD SECOND TIME . THAT IS IT WILL
        // BE CHANGED TO 5000 FIRST TIME BUT IT WILL BE REMAIN IN INITIAL
        // VALUE 100 SECOND TIME

        tw.setyear(1.00);
        */

        /* we must use parameterized constructor , otherwise the basic wont
        be changed
        */
        System.out.println(tw1.salary());
        //System.out.println(th.salary());
        System.out.println(th1.salary());
        //System.out.println(tw.salary());
    }
}



public class Two
{
    public String name = "A";
    public String mobno = "1761900889";
    public double age = 30.00;
    public double basic = 100.00 ;
    public double year = 1.00;

    Two()
    {

    }
    Two(String name,String mobno,double age,double basic,double year)
    {
        this.name=name;
        this.mobno=mobno;
        this.age=age;
        this.basic=basic;
        this.year=year;
    }
    public void setname(String name)
    {
        this.name=name;
    }
    public void setmobno(String mobno)
    {
        this.mobno=mobno;
    }
    public void setage(double age)
    {
        this.age=age;
    }
    public void setbasic(double basic)
    {
        this.basic=basic;
    }
    public void setyear(double year)
    {
        this.year=year;
    }
    public String getname()
    {
        return name;
    }
    public String getmobno()
    {
        return mobno;
    }
    public double getage()
    {
        return age;
    }
    public double getbasic()
    {
        return basic;
    }
    public double getyear()
    {
        return year;
    }

    public double salary()
    {
        double s = basic * 2 * year ;
        return s;
    }
}




public class Three extends Two
{
    public double increament = ((basic*75)/100);
    Three()
    {
        super();
    }
    Three(String name,String mobno,double age,double basic,double year)
    {
        this.name=name;
        this.mobno=mobno;
        this.age=age;
        this.basic=basic;
        this.year=year;
    }

    public double salary()
    {
        double sa = ( (basic + increament)* 2 * year ) ;
        return sa;
    }
}