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) {
    list($a, $operator, $b) = getInputExplodeBySpaces();
    $result[] = calc($a, $operator, $b);
}
echo implode(PHP_EOL, $result), PHP_EOL;
 
function getInputExplodeBySpaces()
{
    return explode(' ', trim(fgets(STDIN)));
}
 
function calc($a, $operator, $b)
{
    switch ($operator) {
        case '+':
            $result = addTwoNum($a, $b);
            break;
        case '-':
            $result = subTractTwoNum($a, $b);
            break;
        case '*':
            $result = multiplyTwoNum($a, $b);
            break;
        case '/':
            $result = divideTwoNumByFloorPoint($a, $b);
            break;
        case '?':
            exit;
    }
     
    return $result;
}
 
function addTwoNum($a, $b)
{
    return $a + $b;
}
 
function subTractTwoNum($a, $b)
{
    return $a - $b;
}
   
function multiplyTwoNum($a, $b)
{
    return $a * $b;
}
 
function divideTwoNumByFloorPoint($a, $b)
{
    return floor($a / $b);
}