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: Wrong Answer)

var input = ""
process.stdin.resume();
process.stdin.setEncoding('utf-8');
process.stdin.on('data', function(chunk) {
  input += chunk;
});
 
process.stdin.on('end', function() {
  input = input.split("\n");
  i = 0
  
  while (true) {
    arr = input[i].split(" ");
    if (arr[1] == "?") { break; }

    arr[0] = Number(arr[0]);
    arr[2] = Number(arr[2]);
 
    switch (arr[1]) {
      case "+":
        console.log(arr[0] + arr[2]);
        break;
      case "-":
        console.log(arr[0] - arr[2]);
        break;
      case "*":
        console.log(arr[0] * arr[2]);
        break;
      case "/":
        console.log(arr[0] / arr[2]);
        break;
    }
 
    i++;
  }
});