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 PHP (judge verdict: Accepted)

<?php
  $ary = array();
  while (true) {
    list($a, $op, $b) = explode(" ", trim(fgets(STDIN)));
    if ($op == "?") {
      break;
    }
    $ary_2 = array($a, $op, $b);
    array_push($ary, $ary_2);
  }
  $count = count($ary);
  foreach ($ary as $key => $val) {
    $a = $val[0];
    $b = $val[2];
    if ($val[1] == "+") {
      print floor($a + $b);
    } else if ($val[1] == "-") {
      print floor($a - $b);
    } else if ($val[1] == "*") {
      print floor($a * $b);
    } else {
      print floor($a / $b);
    }
    if ($key+1 < $count) {
      print "\n";
    }
  }
?>