Computer Applications
The population of a country in a particular year can be calculated by:
p*(1+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 print the population of each year from 2001 to 2007.
Java
Java Constructors
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Answer
import java.util.Scanner;
public class Population
{
private float p;
private float r;
public Population(float a, float b)
{
p = a;
r = b;
}
public void print() {
float q = p;
for (int y = 2001; y <= 2007; y++) {
q = q * (1 + r / 100);
System.out.println("Population in " + y + ": " + q);
}
}
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.print("Enter population in the year 2000: ");
float x = in.nextFloat();
System.out.print("Enter growth rate: ");
float y = in.nextFloat();
Population obj = new Population(x,y);
obj.print();
}
}Variable Description Table
Program Explanation
Output
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