int a,b;
void getdata(int x, int y)
{

a=x;
b=y;

}

void sum()
{
System.out.println(”sum = “+(a+b));
}

}

class test1 extends test

{

int c,d;
void getdata()

{
c=20;
d=30;
}

void sum()
{
System.out.println(”sum = “+(a+b));

}

}

class temp
{
public static void main(String args[])

{

test t1 = new test();

t1.getdata();
t1.sum();

test1 t2 = new test1();

t2.getdata();
t2.sum();

}
}