Question
A super class Detail has been defined to store the details of a customer.Define a sub class Bill to compute the monthly telephone charge of the customer as per the chart given below:
NUMBER OF CALLS RATE
1-100 only rental Charge
101-200 60 paisa per call +rental charge
201-300 80 paisa per call+rental charge
Above 300 1 rupee per call + rental charge
The details of both the classes are given below:
Classname:Detail
Data member / instance variables:
name: to store the name of the customer
address:to store the address of the customer
telno:to store the phone number of the customer
rent:to store the monthly rental charge
Member functions:
Detail(…): parameterized constructor to assign values to data members
void show(): to display the detail of the customer
Classname:Bill
Data members / instance variables:
n: to store the number of calls
amt:to store the amount to be paid by the customer
Member function:
Bill(…):parameterized constructor to assign value to data member of both classes and to initialize amt=0.0
void cal():calculates the monthly tel phone charge as per the chart given above
void show( ):display the details of the customer and amount to be paid
Specify the class Detail giving details of the constructor() and void show(). Using the concept of inheritance , specify the class Bill giving details of the constructor( ) , void cal() and void show().
THE MAIN() FUNCTION AND ALGORITHM NEED NOT BE WRITTEN
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Code
public class Detail
{
String name,address;
long telno;
double rent;
Detail(String n,String a,long t,double r)
{
name=n;
address=a;
telno=t;
rent=r;
}
void show()
{
System.out.println("Name:"+name);
System.out.println("Address:"+address);
System.out.println("Telephone Number:"+telno);
System.out.println("MonthlyRent:"+rent);
}
}
public class Bill extends Detail
{
int n;
double amt;
Bill(String a,String b,long c,double d,int e)
{
super(a,b,c,d);
n=e;
amt=0.0;
}
void cal()
{
if(n>=1 && n<=100)
{
amt=rent;
}
else if(n>=101 && n<=200)
{
amt=n*0.6+rent;
}
else if(n>=201 && n<=300)
{
amt=n*0.8+rent;
}
else if(n>300)
{
amt=n+rent;
}
}
void show()
{
super.show();
System.out.println("Number of calls="+n);
System.out.println("Amount to pay="+amt);
}
}
