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: Wrong Answer)

<?php

while (true) {
    fscanf(STDIN, '%d %s %d', $a, $op, $b);
    $result = culc($a, $op, $b);

    if (is_null($result)) { break; }
    $results[] = $result;
}

printf('%s%s', implode(PHP_EOL, $results), PHP_EOL);

function culc($a, $op, $b)
{
    switch ($op) {
        case '+':
            return $a + $b;
        case '-':
            return $a - $b;
        case '*':
            return $a * $b;
        case '/':
            return (float)($a / $b);
    }

    return null;
}