calculator.java

import java.util.*;
public class calculator {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter a = ");
        int a =sc.nextInt();
        System.out.println("Enter operator = ");
        char operator = sc.next().charAt(0);
        System.out.println("Enter b = ");
        int b= sc.nextInt();
        switch(operator) {
            case'+': System.out.println(a+b);
                   break;
            case '-' : System.out.println(a-b);
                   break;
            case '*' : System.out.println(a*b);
                   break;
            case '/' : System.out.println(a/b);    
                   break;
            case '%' : System.out.println(a%b);
                   break;
            default : System.out.println("Calculator not that advance");

        }

    }
    
}