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;

public class Main {
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    int a = s.nextInt();
    String op = s.next();
    int b = s.nextInt();
    while (!op.equals("?")) {
      switch(op) {
        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;
      }
      a = s.nextInt();
      op = s.next();
      b = s.nextInt();
    }
    s.close();
  }
}