calc(java)

package com.company;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Double res = 0.0;
        Scanner in = new Scanner(System.in);
        String expression = in.nextLine();


    }
}


/*String avNums = "0123456789";
        String avLetters = " ()./*-+";

        String[] splitEx = expression.split("");
        Boolean stop = false;

        for (int i = 0; i < splitEx.length; i++)
            if (!avNums.contains(splitEx[i]) || !avLetters.contains(splitEx[i]))
            {
                stop = true;
                break;
            }

        if (stop)
        {
            System.out.println("Input error");
        }
        else
        {

        }*/