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 Scala (judge verdict: Accepted)

/**
  * http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ITP1_4_C
  * ?¨???????
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  * ????????????????????? op ??????"+"(???)???"-"(???)???"*"(???)???"/"(???)???????????¨??????
  * ???????????§????????????????????´??????????°???°?????\??????????????¨????????????????¨????????????¨????????????
  * ??\???????????°????????????????????????????§???????????????????????????????????????????????????¢????????\????????¨????????§??????
  * a op b
  * op ??? '?' ?????¨??? ??\?????????????????????????????????????????±???????????????????????£????????????????????????
  */
object Main {
  def main(args: Array[String]): Unit = {
    Iterator.continually(io.StdIn.readLine()).takeWhile(_ != null).map(_.split(" +"))
      .map { case Array(a, op, b) => (a.toInt, op, b.toInt) }
      .takeWhile { case (_, op, _) => op != "?" }
      .map {
        case (a, op, b) => op match {
          case "+" => a + b
          case "-" => a - b
          case "*" => a * b
          case "/" => a / b
        }
      }
      .foreach(println)
  }
}