import java.util.Scanner;
import java.text.*;

public class RIA {
  double intLow,intHigh;
  double orgPrincipal,curPrincipal;
  
  public RIA() {
     Scanner s=new Scanner(System.in);
     System.out.println("Account principal:");
     orgPrincipal=s.nextDouble();
     curPrincipal=orgPrincipal;
     System.out.println("Worse case interest:");
     intLow=s.nextDouble();
     System.out.println("Best case interest:");
     intHigh=s.nextDouble();
  }
  
  public double getRandomInterest() {
    double span=intHigh-intLow;
    double randInterest=Math.random()*span+intLow;
    return randInterest;
  }
  
  public void addYear() {
    double i;
    i=getRandomInterest();
    double multiplier=1+i;
    curPrincipal=curPrincipal*multiplier;
  }  
}