Janady13/School-Work / School Work/ancestorPrintingProgram.java

Source identity

Field	Recorded value
Source type	GitHub source
Original record	Janady13/School-Work / School Work/ancestorPrintingProgram.java
Date	Not specified in source
Repository	Janady13/School-Work
Revision	4a666c890caf7c43c47d0572dbcc287373c7a78e
Branch	main
Path or archive member	School Work/ancestorPrintingProgram.java
Original SHA-256	70bf961d3ca4a47d14549c79a717acd0baadb3e716c45aca3c3e737698023f93
Git blob SHA	bf97f144c169dce9b192b44056a6bbc6c8ffc724
Reading-copy SHA-256	70bf961d3ca4a47d14549c79a717acd0baadb3e716c45aca3c3e737698023f93

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import java.util.Scanner;

public class AncestorsPrinter {
    public static void main (String[] args) {
        Scanner scnr = new Scanner(System.in);
        final int YEARS_PER_GEN = 20;
        int userYear;   //Approx. years per generation
        int consYear;   //User input
        int numAnc;     //Approx. ancestors in considered year

        consYear = 2020;
        numAnc = 2;

        System.out.println("Enter a past year (neg. for B.C.): ");
        userYear = scnr.nextInt();

        while(consYear >= userYear){
            System.out.println("Ancestors in " + consYear + ": " + numAnc);

            numAnc = 2 * numAnc;    //Each ancestor has two parents
            consYear = consYear - YEARS_PER_GEN;    //Go back 1 generation
        }

    }
}