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Thread: Counter troubles

  1. #1
    Junior Member
    Join Date
    Oct 2011
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    Default Counter troubles

    Hey guys im new to java programming and have an assigment to write a code to calculate the current population of a organism.
    My problem is i cannot figure out how use my updated population size, he counter just keeps on calulating the population size of the
    given number . ( Hope this is clear run the program and my problem wil be obvious)

    import java.util.Scanner;

    public class Population
    public static void main(String[] args)
    double popsize;
    double averagepopincrease;
    double days;

    Scanner keyboard = new Scanner(System.in);
    System.out.println("Please enter the number of organisms");
    popsize = keyboard.nextDouble();
    if(popsize < 2)
    System.out.println( "Must be atleast 2 oranisms");

    Scanner keyboard1 = new Scanner(System.in);
    System.out.println("Please enter the population increase as a decimal");
    averagepopincrease = keyboard1.nextDouble();
    if(averagepopincrease <= 0)
    System.out.println( "Average Population increase cannot be a negative number");

    Scanner keyboard2 = new Scanner(System.in);
    System.out.println("Please enter the amount of days you wish to calculate");
    days = keyboard2.nextDouble();

    for( days = 1; days <= 10; days++)
    System.out.println((popsize * averagepopincrease) + popsize);


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
    Join Date
    Oct 2010
    Washington, DC
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    Thanked 636 Times in 540 Posts

    Default Re: Counter troubles

    When posting code, please use the highlight tags to preserve formatting.

    Why are you creating multiple scanners?

    When do you take into account which day it is? When do you actually change the population? You're only using the initial values.
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