Final Part 2 12/12/17

import java.util.Scanner;
public class Final {
    static Scanner scan = new Scanner(System.in);


    public static void main(String args[]) {

        System.out.println("Input your first number: ");
        double number = scan.nextDouble();
        System.out.println("Input your second number: ");
        double number2 = scan.nextDouble();

        //System.out.println(number);

        System.out.println("What function would you want to do?");
        String userFunction = scan.next();

        userInput(number, number2, userFunction);
         }


    public static void userInput(double a, double b, String func){

        System.out.println("Your answer will be: ");
//        System.out.println(add(a, b));

        if (func.equals("add")){
             System.out.println(add(a, b));
        } else if (func.equals("subtract")){
             System.out.println(subtract(a, b));
        } else if (func.equals("multiply")){
             System.out.println(multiply(a, b));
        }else if (func.equals("divide")){
             System.out.println(divide(a, b));
        }

        System.out.println(simpleInterest());
        System.out.println(CompoundInterest());
    }

    public static double add(double firstNumber, double secondNumber) {
        return firstNumber + secondNumber;
    }

    public static double subtract(double firstNumber, double secondNumber) {
        return firstNumber - secondNumber;
    }

    public static double multiply(double firstNumber, double secondNumber) {
        return firstNumber * secondNumber;
    }

    public static double divide(double firstNumber, double secondNumber) {
        return firstNumber / secondNumber;
    }

    public static double simpleInterest(){
        float p, r, t;
        Scanner s = new Scanner(System.in);
            System.out.print("Enter the Principal : ");
        p = s.nextFloat();
            System.out.print("Enter the Rate of interest : ");
        r = s.nextFloat();
            System.out.print("Enter the Time period : ");
        t = s.nextFloat();
        float si;
        si = (r * t * p) / 100;
        System.out.print("The Simple Interest is : " + si);
        return si;
    }

    public static double CompoundInterest() {
        Scanner input = new Scanner(System.in);

            double principal = 0;
            double rate = 0;
            double time = 0;

            double compoundInterest = 0;

            System.out.print("Enter the Principal amount : ");
            principal = input.nextDouble();

            System.out.print("Enter the Rate : ");
            rate = input.nextDouble();

            System.out.print("Enter the Time : ");
            time = input.nextDouble();

            compoundInterest = principal * Math.pow((1 + rate/100),time);

            System.out.println("");
            System.out.println("The Compound Interest is : "
                    + compoundInterest);

            return compoundInterest;
        }

    }