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
$p='';
while(1){
  list($a,$o,$b)=explode(' ',trim(fgets(STDIN)));
  if($o=='?'){break;}
  switch($o){
    case '+':$p.=$a+$b;break;
    case '-':$p.=$a-$b;break;
    case '*':$p.=$a*$b;break;
    case '/':$p.=floor($a/$b);break;
  }
  $p.=PHP_EOL;
}
print $p;