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 Ruby (judge verdict: Accepted)

arr = []
brr = []
orr = []
while true
  a, op, b = gets.split.map(&:to_s)
  a = a.to_i
  b = b.to_i
  break if op == "?"
  arr.push(a)
  brr.push(b)
  orr.push(op)
end
roop_num = 0
arr.zip(brr) do |a, b|
  op = orr[roop_num]
  case op
  when "+" then
    puts a + b
  when "-" then 
    puts a - b
  when "/" then
    puts a / b
  when "*" then
    puts a * b
  end
  roop_num = roop_num + 1
end