ZCW-MacroLabs-OOP-ScientificCalculator/CoreFeatures.java

/**
 * Write a description of class CoreFeatures here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class CoreFeatures {
    
    public double add(double x) {
        double y = Console.getDoubleInput();
        return x + y;
    }

    public double subtract(double x) {
        double y = Console.getDoubleInput();
        return x - y;
    }

    public double multiply(double x) {
        double y = Console.getDoubleInput(); 
        return x * y;
    }

    public double divide(double x) {
        double y = Console.getDoubleInput();
        if (y == 0){
            this.error();
            return 0;
        }
        return x / y;
    }

    public double square(double x) {
        return Math.pow(x,2);
    }

    public double sqrt(double x) {
        if (x < 0){
            this.error();
            return 0;
        }
        return Math.pow(x,0.5);
    }

    public double exp(double x) {
        double y = Console.getDoubleInput();
        return Math.pow(x,y);
    }

    public double invert(double x) {
        if (x == 0){
            this.error();
            return 0;
        }
        return 1 / x;
    }

    public double flip(double x) {
        return -1 * x;
    }

    public void error(){
        while (true){
            Console.println("Err");
            String command = Console.getStringInput();
            if (command.equalsIgnoreCase("clear")){
                return;
            }
        }
    }
}