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
while (1) {
    $input = explode(' ', trim(fgets(STDIN)));
    $a = $input[0];
    $b = $input[2];
    $op = $input[1];
    if ($op == '+')
        echo $a + $b.PHP_EOL;
    elseif ($op == '-')
        echo $a - $b.PHP_EOL; 
    elseif ($op == '/')
        echo floor($a / $b).PHP_EOL;
    elseif ($op == '*')
        echo $a * $b.PHP_EOL;
    else
    break;
}