homework_changes

Suzana_Marek

Aug 27th, 2024

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package org.example;
import java.util.Scanner;
public class homeworkChanges {
public interface Operation {
double perform(double num1, double num2);
}
public class Addition implements Operation {
public double perform(double num1, double num2) {
return num1 + num2;
}
}
public class Subtraction implements Operation {
public double perform(double num1, double num2) {
return num1 - num2;
}
}
public class Multiplication implements Operation {
public double perform(double num1, double num2) {
return num1 * num2;
}
}
public class Division implements Operation {
public double perform(double num1, double num2) {
if (num2 != 0) {
return num1 / num2;
} else {
throw new ArithmeticException("Cannot divide by zero");
}
}
}
public class CalculatorMenu {
public void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("Choose an operation:");
System.out.println("1) Addition");
System.out.println("2) Subtraction");
System.out.println("3) Multiplication");
System.out.println("4) Division");
System.out.println("0) Exit");
System.out.print("Enter your choice: ");
int choice = scanner.nextInt();
if (choice == 0) {
System.out.println("Exiting the program...");
break;
}
System.out.print("Enter first number: ");
double num1 = scanner.nextDouble();
System.out.print("Enter second number: ");
double num2 = scanner.nextDouble();
Operation operation = null;
if (choice == 1) {
operation = new Addition();
} else if (choice == 2) {
operation = new Subtraction();
} else if (choice == 3) {
operation = new Multiplication();
} else if (choice == 4) {
operation = new Division();
} else {
System.out.println("Invalid command.");
continue;
}
System.out.print("Do you want to solve another task? (yes/no): ");
String response = scanner.next();
if (!response.equalsIgnoreCase("yes")) {
break;
}
}
scanner.close();
}
}
}

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