4) Write a Java program on Multilevel Inheritance.

 Multilevel Inheritance:

Source file Name: Multileveldemo.java

class A 

{ 

void sum(int a,int b) 

{ 

System.out.println("sum="+(a+b));

} 

} 

class B extends A 

{ 

void sub(int a,int b) 

{ 

System.out.println("substract="+(a-b)); }

} 

class C extends B 

{ 

void sqcube(int n) 

{ 

int sq=n*n; 

int c=n*n*n; 

System.out.println("square="+sq+" cube="+c); } 

} 

class Multileveldemo 

{ 

public static void main(String as[]) 

{ 

System.out.println("Inheritance program");

C ob=new C(); 

ob.sum(12,23); 

ob.sub(25,15); 

ob.sqcube(6); 

} 

} 

Output 

E:\sysem3>javac Multileveldemo.java

E:\sysem3>java Multileveldemo 

Inheritance program

sum=35 

substract=10 

square=36 cube=216