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 JavaScript (judge verdict: Accepted)

'use strict';
(function(stdin) {
  var lines  = stdin.toString().split('\n');
  var result = (function(data) {
    var Calc = {
        '+':function(a,b){return a + b;}
        ,'-':function(a,b){return a - b;}
        ,'*':function(a,b){return a * b;}
        ,'/':function(a,b){return ~~(a / b);}
    };
    var result = [];
    var tmp;
    var index = 0;
    while (true) {
        tmp = data[index++].split(' ');
        if (tmp[1] === '?') break;
        result.push(Calc[tmp[1]](parseInt(tmp[0],10),parseInt(tmp[2],10)));
    }
    return result.join('\n');
  }(lines
  ));
  console.log(result);
}(require('fs').readFileSync('/dev/stdin', 'utf8')));