CalcSkin/src/main/java/rocks/zipcode/calcskin/CalcEngine.java

package rocks.zipcode.calcskin;

public class CalcEngine {

    CalcEngine() {
    }

    public double add(double v, double v1) {
        return v + v1 ;
    }

    public double subtract(double v, double v1) { return v - v1; }

    public double multiply(double v, double v1) { return v * v1; }

    public double divide(double v, double v1) {
        return v / v1;
    }

    public double square(double v){ return v*v;}

    public double sqrt(double v){ return Math.sqrt(v);}

    public double inverse(double v){
        double inv = (double)1/v;
        return inv; }
}