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(1){
        fscanf(STDIN,"%d %s %d",$a,$op,$b);
        if( $op == "+" ){
            $x = $a + $b;
            echo $x."\n";
        }
        else if( $op == "-" ){
            $x = $a - $b;
            echo $x."\n";
        }
        else if( $op == "*" ){
            $x = $a * $b;
            echo $x."\n";
        }
        else if( $op == "/" ){
            $x = floor( $a / $b );
            echo $x."\n";
        }
        else if( $op == "?" ){
            break;
        }
    }