계산기 프로그램 백준5613

import java.util.*;
public class asdas {
    public static void main(String[] args) {
     Scanner sc= new Scanner(System.in);

        int num = sc.nextInt();
        while (true){
            String finish = sc.next();
            if(finish.equals("=")){
                break;
            }switch (finish){
                case "+":
                    num += sc.nextInt();
                    break;
                case "-":
                    num-= sc.nextInt();
                    break;
                case "*":
                    num*= sc.nextInt();
                    break;
                case "/":
                    num /= sc.nextInt();
                    break;
            }
        }
        System.out.println(num);
     }
    }