Lab2A.java

// 2A: Write a java program to develop a simple calculator using switch statement.
import java.util.Scanner;

class Lab2A {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int a, b;
        float c = 0;
        System.out.println("Enter 2 numbers: ");
        a = s.nextInt();
        b = s.nextInt();
        System.out.println("Enter the Operator: ");
        char op = s.next().charAt(0);
        switch (op) {
            case '+':
                c = a + b;
                break;
            case '-':
                c = a - b;
                break;
            case '*':
                c = a * b;
                break;
            case '/':
                if (a == 0 || b == 0) {
                    System.out.println("ZeroDivisionError");
                    break;
                } else {
                    c = (float) a / b;
                    break;
                }
            default:
                System.out.println("Invalid Input");
                break;
        }
        System.out.println("Result of " + a + op + b + "=" + c);
    }
}

/*
 * Output:
 
 * Enter 2 numbers:
 * 5 6
 * Enter the Operator:
 * +
 * Result of 5+6=11.0
 
 * Enter 2 numbers:
 * 5 6
 * Enter the Operator:
 * /
 * Result of 5/6=0.8333333
 
 * Enter 2 numbers:
 * 5 0
 * Enter the Operator:
 * /
 * ZeroDivisionError
 
 */