ZCW-MacroLabs-OOP-ScientificCalculator/BonusFeatures.java

//import java.math.Double;
import java.math.*;
/**
 * This class handles factorials and Logarithmic functions
 */
public class BonusFeatures
{
    // instance variables - replace the example below with your own
    Console console = new Console();
    

    /**
     * Constructor for objects of class BonusFeatures
     */
    public BonusFeatures(Console c)
    {
        
     console = c;
    }

    public  Double factorialOf(Double value){
        Double f = 1.00;
        value =  Math.floor(value);
        for(double i = 1; i <= value; i++)
            f *=  i;

        return console.currentValue = f;
    }

    public  double logarithm(Double value){

        return console.changeCurrentValue((double)Math.log10(value));
    }

    public  Double invLogarithm(Double value){
  
        return console.changeCurrentValue(Math.pow(10.00,value));
    }

    public  double lnLogarithm(Double value){

        return console.changeCurrentValue((double)Math.log(value));
    }

    public  double expLogarithm(Double value){

        return console.changeCurrentValue((double)Math.exp(value));
    } 
}