Hello.java

class calculator{
    private  int rollno;
    private String name;
    private int marks; 

    // public int add(int i,int j)
    // {
    //     int k = i + j;
    //     return k;
    // }
    public calculator(){
        rollno = 5;
        name = "titi";
        marks = 58;      
        System.out.println("in default");
    }
    public calculator(int rollno, String name, int marks)
    {
        this.rollno = rollno;
        this.name = name;
        this.marks = marks;
        
    }
    public calculator(calculator obj) // copy constructor
    {
        this.rollno = obj.rollno;
        this.marks = obj.marks;
        this.name = obj.name;
        System.out.println("in copy constructor");
    }
    public void setRoll( int roll){
        rollno = roll;
    }
    public int getRoll(){
        return rollno;
    }


     public void setName(String names){
        name = names;
    }
     public String getName(){
        return name;
    }



     public void setMark(int mark){
        marks = mark;
    }
     public int getMarks(){
        return marks;
    }
    
    
    

}
public class Hello
{
    public static void main(String args[]){
        // calculat{
        calculator tea = new calculator();
        calculator cal = new calculator(12,"vic",56);
        
        // cal.setRoll(12);
        // cal.setName("james");
        // cal.setMark(90);
       System.out.println("Name " + ": " + "Roll no " + ": " + "Marks scores");
       System.out.println(cal.getName() + " : " + cal.getRoll() + " : " + cal.getMarks());
       calculator obj1 = new calculator(tea);
       System.out.println(obj1.getName() + " +" + obj1.getRoll() + " +" + obj1.getMarks());
       
    }

}