/**
 * All features of CoreFeatures here.
 *
 * @author (David Thornley)
 * @version (0.1)
 */

import java.util.Scanner;

public class CoreFeatures
{
    // instance variables - replace the example below with your own
    
    private Console console = new Console();
    
    /**
     * Constructor for objects of class CoreFeatures
     */
    public CoreFeatures(Console c)
    {
        
     console = c;
    }
    
    
    public  double add(double b) {
        
        return console.changeCurrentValue(console.getCurrentValue() + b); 
    }
    
    public  double subtract(double b) {
        return console.changeCurrentValue(console.getCurrentValue() - b);
    }
    
    public  double multiply(double b) {
        return console.changeCurrentValue(console.getCurrentValue() * b);
    }
    
    public  double divide(double b) {
            if ( b != 0){
            return console.changeCurrentValue(console.getCurrentValue() / b);
        }else {console.println("Cannot Divide by 0, Please Try Another Number.");
        }
        return console.getCurrentValue();
        }
        
    
    
    public  double square() {
        return console.changeCurrentValue( Math.pow(console.currentValue, 2));
    }
    
    public  double squareRoot() {
        return console.changeCurrentValue( Math.sqrt(console.currentValue));
    }
    
    public  double inverse() {
        return console.changeCurrentValue( (1/console.currentValue));
    }
    
    public  double changeSign() {
        return console.changeCurrentValue((console.currentValue *= -1));
    }
    
    public  double variableExponentiation(double b) {
        return console.changeCurrentValue(Math.pow(console.currentValue,b));
    }
    
    
}