Interface

import java.io.*;

class student
{
int rno;
void getno(int n)
{
rno=n;
}
void dispno()
{
System.out.println("Roll No:"+rno);
}
}

class exam extends student
{
int m1,m2;
void getmarks(int mark1,int mark2)
{
m1=mark1;
m2=mark2;
}
void dispmarks()
{
System.out.println("mark 1:"+m1);
System.out.println("mark 2:"+m2);
}
}
interface sports
{
int sprt=50;
void disp_sprt();
}


class result extends exam implements sports
{
int total;
public void disp_sprt()
{
System.out.println("sports mark="+sprt);
}
void display()
{
dispno();
dispmarks();
disp_sprt();
total=m1+m2+sprt;
System.out.println("total="+total);
}
}

class inheri
{
public static void main(String args[])
{
result s=new result();
s.getno(123);
s.getmarks(70,80);
s.display();
}
}