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')));