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  1. import java.io.*;
  2. class calculatebill
  3. {
  4.     double billpay;
  5.     void bill(long units)
  6.     {
  7.         if(units<100)
  8.         billpay=units*1.20;
  9.         else if(units<300)
  10.         billpay=100*1.20+200*2+(units-100)*2;
  11.         else if(units>300)
  12.         billpay=100*1.20+200*2+(units-300)*3;
  13.     }
  14.    }
  15.    class computeelectricitybill extends calculatebill
  16.    {
  17.        public static void main(String args[])
  18.        {
  19.            long units;
  20.            DataInputStream in = new DataInputStream(System.in);
  21.            System.out.println("calculate bill using inheritance");
  22.            try
  23.            {
  24.                System.out.println("enter no of units:");
  25.                units=Integer.parseInt(in.readLine());
  26.                computeelectricitybill b= new computeelectricitybill();
  27.                b.bill(units);
  28.                System.out.println("bill to pay:"+b.billpay);
  29.            }
  30.            catch(Exception e){}
  31.  
  32.  
  33.  
  34.        }
  35.    }
Success #stdin #stdout 0.09s 52544KB
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Standard input is empty
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calculate bill using inheritance
enter no of units:
https://ideone.com/hIQxPm
language:
Java (HotSpot 12)
created:
3 days ago
visibility:
public

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