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: WA: Presentation Error)

<?php
while(true)
{
    $in = explode(" ", trim(fgets(STDIN)));
    $a = $in[0];
    $op = $in[1];
    $b = $in[2];
    if($op == "?")
    {
        break;
    }
    else
    {
        switch ($op) {
            case '+':
                echo $a + $b;
                break;
            case '-':
                echo $a - $b;
                break;
            case '*':
                echo $a * $b;
                break;
            default:
                echo floor($a / $b);
                break;
        echo "\n";
        }
    }
}