/**
 * Kalkulator
 */
import java.util.Scanner;

public class Kalkulator {

    public static boolean isNumeric(String str) {
        try {
            Integer.parseInt(str);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }

    public static boolean isOperator(String str) {
        if ((str.equals("+")) || (str.equals("-")) || (str.equals("*")) || (str.equals("/")) || (str.equals("%"))
                || (str.equals("^")))
            return true;
        return false;
    }

    public static void main(String[] args) {

        boolean t1 = false;
        boolean t2 = false;
        boolean t3 = false;
        String n1, n2, n3;
        int h1 = 0;
        int h2 = 0;
        String h3 = "";
        float val1, val2, val3;
        Scanner scan = new Scanner(System.in);
        while (!t1) {
            System.out.print("Nilai-1 = ");
            n1 = scan.nextLine();
            if (isNumeric(n1)) {
                h1 = Integer.parseInt(n1);
                t1 = true;
            }
        }

        while (!t2) {
            System.out.print("Nilai-2 = ");
            n2 = scan.nextLine();
            if (isNumeric(n2)) {
                h2 = Integer.parseInt(n2);
                t2 = true;
            }
        }

        while (!t3) {
            System.out.print("Operator [+, -, *, /, %, ^] = ");
            n3 = scan.nextLine();
            if (isOperator(n3)) {
                h3 = n3;
                t3 = true;
            }
        }
        switch (h3) {
        case "+":
            val1 = (float) h1;
            val2 = (float) h2;
            val3 = val1 + val2;
            System.out.printf("Hasil: %,.2f + %,.2f = %,.2f", val1, val2, val3);
            break;
        case "-":
            val1 = (float) h1;
            val2 = (float) h2;
            val3 = val1 - val2;
            System.out.printf("Hasil: %,.2f - %,.2f = %,.2f", val1, val2, val3);
            break;
        case "*":
            val1 = (float) h1;
            val2 = (float) h2;
            val3 = val1 * val2;
            System.out.printf("Hasil: %,.2f * %,.2f = %,.2f", val1, val2, val3);
            break;
        case "/":
            val1 = (float) h1;
            val2 = (float) h2;
            val3 = val1 / val2;
            System.out.printf("Hasil: %,.2f / %,.2f = %,.2f", val1, val2, val3);
            break;
        case "^":
            val1 = (float) h1;
            val2 = (float) h2;
            val3 = (float) Math.pow((double) val1, (double) val2);
            System.out.printf("Hasil: %,.2f ^ %,.2f = %,.2f", val1, val2, val3);
            break;
        case "%":
            val1 = (float) h1;
            val2 = (float) h2;
            val3 = val1 % val2;
            System.out.printf("Hasil: %,.2f % %,.2f = %,.2f", val1, val2, val3);
            break;
        default:
            break;
        }
        scan.close();
    }
}