Problem:
Simple Calculator

Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.

The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.

Input

The input consists of multiple datasets. Each dataset is given in the following format.

a op b

The input ends with a dataset where op = '?'. Your program should not process for this dataset.

Output

For each dataset, print the value in a line.

Constraints

0 ≤ a, b ≤ 20000

No divisions by zero are given.

Sample Input 1

1 + 2
56 - 18
13 * 2
100 / 10
27 + 81
0 ? 0

Sample Output 1

3
38
26
10
108

Solution in JAVA (judge verdict: Accepted)

import java.util.Scanner;
import java.lang.Math;

public class Main {
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    while(true){
      int a = scan.nextInt();
      String s = scan.next();
      int b = scan.nextInt(); 


      if (s.equals("?")) break;

      switch (s) {
        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:
          break;
      }
    }
    scan.close();
  }
}