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)

var lines = [];
var reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});
reader.on('line', function (line) {
  var a = line.split(' ');
  var b = parseInt(a[0],10);
  var c = parseInt(a[2],10);
  if(a[1]=='+')
  	b = b + c;
  else if(a[1]=='+')
  	b = b + c;
  else if(a[1]=='-')
  	b = b - c;
  else if(a[1]=='*')
  	b = b * c;
  else if(a[1]=='/')
  	b = b / c;
   if(a[1]=='?')
  	process.exit();
  console.log(Math.floor(b));
});
process.stdin.on('end', function () {
});