public class CalculatorFunction {

    public int  operation(int a, int b , String s){
        switch (s) {
            case "+":
                return a + b;
            case "-":
                return a - b;
            case "*":
                return a * b;
            case "/":
                if (b != 0){
                    return a / b;
                }
                else {
                    System.out.println("You can`t divide by 0");
                }

        }
        return 0;
    }
}