public class Steps {

    public StepSpec computeDesign(double totalRise, double totalRun,
                            StepEvaluator eval, double idealRise){

        int numSteps;
        StepSpec[] ssarray = new StepSpec[3];
        double[] goodness = new double[3];
        double newrise;
        double newrun;
        int i;

        numSteps = (int) (totalRise / idealRise);

        for(i = 0; i < 3; i++){
                newrise = totalRise / numSteps;
                newrun = totalRun / (numSteps -1);
                ssarray[i] = new StepSpec(newrise, newrun, numSteps);
                goodness[i] = eval.evaluate(ssarray[i]);
        }

        if (goodness[1] < goodness[2] && goodness[1] < goodness[3])
                return ssarray[1];

        if (goodness[2] < goodness[1] && goodness[2] < goodness[3])
                return ssarray[2];

        if (goodness[3] < goodness[2] && goodness[3] < goodness[1])
                return ssarray[3];
        }

        return null;
}