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($input_line = trim(fgets(STDIN))){

        $num = explode(" ",$input_line);
        // echo $num[1];
        if($num[1]=="+"){
            echo $num[0]+$num[2];
            
        }elseif($num[1]=="-"){
            echo $num[0]-$num[2];
            
        }elseif($num[1]=="*"){
            echo $num[0]*$num[2];
            
        }elseif($num[1]=="/"){
            echo floor($num[0]/$num[2]);
            
        }elseif($num[1]=="?"){
            break;
        }
        echo "\n";
    }
?>