ZCW-MacroLabs-OOP-ScientificCalculator/CoreFunctions.java

public class CoreFunctions 
{

    public static boolean decMode = true;
    public static boolean hexMode = false;
    public static boolean binMode = false;
    public static boolean octMode = false;
    public static String hexOut;
    public static String binOut;
    public static String octOut;


    public static double add(double display, double entered) {
        if(decMode == true){
            System.out.println(display + entered);
            return display = display + entered;
        }
        else if(hexMode == true) {
            hexOut = Double.toHexString(display + entered);
            System.out.println(hexOut);
            return display = display + entered;
        }
        else if(binMode == true) {
            binOut = Long.toBinaryString(Double.doubleToRawLongBits((display + entered)));
            System.out.println(binOut);
            return display = display + entered;
        }
        else {
            octOut = Long.toOctalString(Double.doubleToRawLongBits((display + entered)));
            System.out.println(octOut);
            return display = display + entered;
        }
    }

    public static double subtract(double display, double entered) {
        if(decMode == true){
            System.out.println(display - entered);
            return display = display - entered;
        }
        else if(hexMode == true) {
            hexOut = Double.toHexString(display - entered);
            System.out.println(hexOut);
            return display = display - entered;
        }
        else if(binMode == true) {
            binOut = Long.toBinaryString(Double.doubleToRawLongBits((display - entered)));
            System.out.println(binOut);
            return display = display - entered;
        }
        else {
            octOut = Long.toOctalString(Double.doubleToRawLongBits((display - entered)));
            System.out.println(octOut);
            return display = display - entered;
        }
    }

    public static double multiply(double display, double entered) {
        if(decMode == true){
            System.out.println(display * entered);
            return display = display * entered;
        }
        else if(hexMode == true) {
            hexOut = Double.toHexString(display * entered);
            System.out.println(hexOut);
            return display = display * entered;
        }
        else if(binMode == true) {
            binOut = Long.toBinaryString(Double.doubleToRawLongBits((display * entered)));
            System.out.println(binOut);
            return display = display * entered;
        }
        else {
            octOut = Long.toOctalString(Double.doubleToRawLongBits((display * entered)));
            System.out.println(octOut);
            return display = display * entered;
        }
    }

    public static double divide(double display, double entered) {
        if(entered != 0){
            if(decMode == true){
                System.out.println(display / entered);
                return display = display / entered;
            }
            else if(hexMode == true) {
                hexOut = Double.toHexString(display / entered);
                System.out.println(hexOut);
                return display = display / entered;
            }
            else if(binMode == true) {
                binOut = Long.toBinaryString(Double.doubleToRawLongBits((display / entered)));
                System.out.println(binOut);
                return display = display / entered;
            }
            else {
                octOut = Long.toOctalString(Double.doubleToRawLongBits((display / entered)));
                System.out.println(octOut);
                return display = display / entered;
            }
        }else {
            System.out.println("Err");
            return display = 0;
        }
    }

    public static double exp(double display, double entered) {
        if(decMode == true){
                System.out.println( Math.pow(display,entered));
                return display = Math.pow(display,entered);
            }
            else if(hexMode == true) {
                hexOut = Double.toHexString(Math.pow(display,entered));
                System.out.println(hexOut);
                return display = Math.pow(display,entered);
            }
            else if(binMode == true) {
                binOut = Long.toBinaryString(Double.doubleToRawLongBits(Math.pow(display,entered)));
                System.out.println(binOut);
                return display = Math.pow(display,entered);
            }
            else {
                octOut = Long.toOctalString(Double.doubleToRawLongBits(Math.pow(display,entered)));
                System.out.println(octOut);
                return display = Math.pow(display,entered);
            }
       
        
    }
}