└── Calculator.java


/Calculator.java:
--------------------------------------------------------------------------------
 1 | import java.util.Scanner;
 2 | 
 3 | public class Calculator {
 4 |     public static void main(String[] args) {
 5 |         Scanner sc = new Scanner(System.in);
 6 |         System.out.print("Enter first number: ");
 7 |         double a = sc.nextDouble();
 8 |         System.out.print("Enter operator (+ - * /): ");
 9 |         char op = sc.next().charAt(0);
10 |         System.out.print("Enter second number: ");
11 |         double b = sc.nextDouble();
12 |         double result = 0;
13 | 
14 |         switch (op) {
15 |             case '+': result = a + b; break;
16 |             case '-': result = a - b; break;
17 |             case '*': result = a * b; break;
18 |             case '/': result = b != 0 ? a / b : 0; break;
19 |             default: System.out.println("Invalid operator"); return;
20 |         }
21 | 
22 |         System.out.println("Result: " + result);
23 |     }
24 | }


--------------------------------------------------------------------------------