SciCalcTest.java

import Scientific.*;
import java.util.Scanner;

public class SciCalcTest {

    // Define the menu options as an enum
    public enum Options {
        DECIMAL_TO_BINARY(1, "Convert Decimal to Binary"),
        BINARY_TO_DECIMAL(2, "Convert Binary to Decimal"),
        DECIMAL_TO_HEX(3, "Convert Decimal to Hexadecimal"),
        DECIMAL_TO_IEEE754(4, "Convert Decimal to IEEE754"),
        DECIMAL_TO_SCIENTIFIC(5, "Convert Decimal to Scientific Notation"),
        EXIT(6, "Exit");

        private final int code;
        private final String description;

        Options(int code, String description) {
            this.code = code;
            this.description = description;
        }

        public int getCode() {
            return code;
        }

        public String getDescription() {
            return description;
        }

        public static Options fromCode(int code) {
            for (Options option : values()) {
                if (option.getCode() == code) {
                    return option;
                }
            }
            return null;
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        SciCalc calc = new SciCalc(); 

        while (true) {
            System.out.println("\n==== SCIENTIFIC CALCULATOR ====");
            for (Options option : Options.values()) {
                System.out.printf("%d. %s%n", option.getCode(), option.getDescription());
            }
            System.out.print("Choose an option: ");

            try {
                int choice = Integer.parseInt(scanner.nextLine());
                Options selectedOption = Options.fromCode(choice);

                if (selectedOption == null) {
                    System.out.println("Invalid option. Please choose a valid number.");
                    continue;
                }

                switch (selectedOption) {
                    case DECIMAL_TO_BINARY:
                        System.out.print("Enter a decimal number: ");
                        try {
                            int decimalNumber = Integer.parseInt(scanner.nextLine());
                            String binary = calc.base10ToBase2(decimalNumber);
                            System.out.println("Binary Representation: " + binary);
                        } catch (NumberFormatException e) {
                            System.out.println("Invalid input. Please enter a valid integer.");
                        }
                        break;

                    case BINARY_TO_DECIMAL:
                        System.out.print("Enter a binary number: ");
                        String binaryInput = scanner.nextLine();
                        try {
                            int decimal = calc.base2ToBase10(binaryInput);
                            System.out.println("Decimal Representation: " + decimal);
                        } catch (Exception e) {
                            System.out.println("Error: " + e.getMessage());
                        }
                        break;

                    case DECIMAL_TO_HEX:
                        System.out.print("Enter a decimal number: ");
                        try {
                            int decimalNumber = Integer.parseInt(scanner.nextLine());
                            String hex = calc.decimalToHex(decimalNumber);
                            System.out.println("Hexadecimal Representation: " + hex);
                        } catch (NumberFormatException e) {
                            System.out.println("Invalid input. Please enter a valid integer.");
                        }
                        break;

                    case DECIMAL_TO_IEEE754:
                        System.out.print("Enter a decimal number: ");
                        try {
                            float number = Float.parseFloat(scanner.nextLine());
                            String ieee754 = calc.decimalToIEEE754(number);
                            System.out.println("IEEE 754 Representation: " + ieee754);
                        } catch (NumberFormatException e) {
                            System.out.println("Invalid input. Please enter a valid number.");
                        }
                        break;

                    case DECIMAL_TO_SCIENTIFIC:
                        System.out.print("Enter a decimal number: ");
                        try {
                            double number = Double.parseDouble(scanner.nextLine());
                            String scientific = calc.decimalToScientific(number);
                            System.out.println("Scientific Notation: " + scientific);
                        } catch (NumberFormatException e) {
                            System.out.println("Invalid input. Please enter a valid number.");
                        }
                        break;

                    case EXIT:
                        System.out.println("Exiting... Goodbye!");
                        scanner.close();
                        return;
                }
            } catch (NumberFormatException e) {
                System.out.println("Invalid input. Please enter a valid number.");
            }
        }
    }
}