Write a program to calculate compound interest using inheritance

public class Power

{

double pr=1;

public double pow(double no,int p)

{

while(p>0)

{

pr=pr*no;

p--;

}

return pr;

}

}

import java.io.*;

public class Ci extends Power

{

int p,t;

double r,ans;

public void input()

throws IOException

{

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter the principal");

p=Integer.parseInt(br.readLine());

System.out.println("enter the rate of interest");

r=Double.parseDouble(br.readLine());

System.out.println("Enter the time");

t=Integer.parseInt(br.readLine());

}

public void output()

{

System.out.println("the compound interest is:"+ans);

}

public void cal()

{

double h=1.0+r/100;

double res=pow(h,t);

ans=p*res-p;

}

}

import java.io.*;

public class Cimain

{

public static void main(String[] arg)

throws IOException

{

Ci c=new Ci();

c.input();

c.cal();

c.output();

}

}