Question

The population of a country in a particular year can be calculated by:

p*(l+r/100) at the end of year 2000, where p is the initial population and r is the growth rate.

Write a program by using a class to find the population of the country at the end of each year from 2001 to 2007. The Class has the following specifications:

Class name: Population
Data Members: float p,r
Member Methods:
Population( int a,int b): Constructor to initialize p and r with a and b respectively.
void print(): to calculate and display the population of each year from 2001 to 2007.

Answer 1

import java.util.*;
public class Population{
float p, r;
Population(int a, int b)
{p = a;
r = b;
}

void print()
{double t;
t = p * Math.pow((1 + r / 100), 6);
System.out.println("The population after 6 years = " + (int)t);
}

public static void main(String args[])
{Scanner ob = new Scanner(System.in);
int x, y;
System.out.println("Enter the present population");
x = ob.nextInt();
System.out.println("Enter the growth rate");
y = ob.nextInt();
Population P = new Population(x, y);
P.print();
}}