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)

import scala.io.StdIn

case class Expr(l:Int, op: String, r:Int)

object Main {
  def main(args: Array[String]): Unit = {
    Iterator.continually(StdIn.readLine()).takeWhile(_ != null).foreach{
      line =>
        if(line.trim.isEmpty == false){
          val inputs = line.split(" ")
            Expr(inputs(0).toInt, inputs(1), inputs(2).toInt) match {
              case Expr(l, "+", r) => println(l + r)
              case Expr(l, "-", r) => println(l - r)
              case Expr(l, "*", r) => println(l * r)
              case Expr(l, "/", r) => println(l / r)
              case _ =>
            }
        }
    }
  }
}