IncPlusPlus/bigtoolbox-math

package io.github.incplusplus.bigtoolbox.math;

import java.math.BigDecimal;
import java.util.Scanner;
import io.github.incplusplus.bigtoolbox.math.differentialandintegratedcalculus.*;
import io.github.incplusplus.bigtoolbox.math.differentialandintegratedcalculus.Integrator;
import io.github.incplusplus.bigtoolbox.math.differentialandintegratedcalculus.Polynomial;
import io.github.incplusplus.bigtoolbox.math.differentialandintegratedcalculus.Term;

/**
 * @author Ryan Cloherty
 */
public class Main
{
    //TODO remove this from bigtoolbox
    //  after figuring out why the heck I put it here in the first place
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        BigDecimal lowerLimit;
        BigDecimal upperLimit;
        int subintervals;
        Polynomial myPolynomial;
        Integrator myIntegrator;

        lowerLimit = Term.getBigDecimalAnswer("lowerLimit", in);
        upperLimit = Term.getBigDecimalAnswer("upperLimit", in);
        if(upperLimit.compareTo(lowerLimit) < 0)
        {
            System.out.println("WARNING: lowerLimit is greater than upperLimit");
        }
        subintervals = Term.getIntAnswerGreaterThan("subintervals", in, 0);
        myPolynomial = new Polynomial(in);
        myIntegrator = new Integrator(lowerLimit, upperLimit, subintervals, myPolynomial);

        System.out.println("#########################################################");
        System.out.println("f(x) = " + myPolynomial.getFormula());
        System.out.println();
        System.out.println("\u222B" + "f(x) = " + myPolynomial.getIntegratedFormula());
        System.out.println("#########################################################");

        System.out.println("Midpoint rule: " + myIntegrator.midpointRule().toEngineeringString());
        System.out.println("Error: " + myIntegrator.percentError(myIntegrator.exactValue(), myIntegrator.midpointRule()).toEngineeringString() + "%");
        System.out.println();
        System.out.println("Trapezoid rule: " + myIntegrator.trapezoidRule().toEngineeringString());
        System.out.println("Error: " + myIntegrator.percentError(myIntegrator.exactValue(), myIntegrator.trapezoidRule()).toEngineeringString() + "%");
        System.out.println();
        System.out.println("Simpson's rule: " + myIntegrator.simpsonsRule().toEngineeringString());
        System.out.println("Error: " + myIntegrator.percentError(myIntegrator.exactValue(), myIntegrator.simpsonsRule()).toEngineeringString() + "%");
        System.out.println();
        System.out.println("Exact value: " + myIntegrator.exactValue().toEngineeringString());
    }
}