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(true){
        list($a, $op, $b) = explode(" ",trim(fgets(STDIN)));
        
        switch ($op) {
            case '?':
                break 2;

            case '+':
                $result = $a + $b;
                break;
            
            case '-':
                $result =  $a - $b;
                break;

            case '*':
                $result =  $a * $b;
                break;

            case '/':
                $result = $a / $b;
                break;
        }
        
        printf("%d\n",$result);

    }