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(fscanf(STDIN,"%d %s %d",$a,$op,$b)) {
        calc($a,$op,$b);
    }


    function calc($a,$op,$b) {
        switch ($op) {
            case "+":
                echo $a + $b . PHP_EOL;
                break;
            case "-":
                echo $a - $b . PHP_EOL;
                break;
            case "*":
                echo $a * $b . PHP_EOL;
                break;
            case "/":
                echo floor($a / $b) . PHP_EOL;
                break;
            case "?":
                exit;
        }
    }
?>