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 EOF = /\w* \? \w*/;
  var inputs  = stdin.toString().split(EOF,1).join().trim().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 >> 0;}
    };

    return data.map(function(v) {
      return Calc[v[1]](parseInt(v[0],10),parseInt(v[2]));
    }).join('\n');

 }(inputs.map(function(v){return v.split(' ')})
  )); 
  console.log(result); 
}(require('fs').readFileSync('/dev/stdin', 'utf8')));