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: Wrong Answer)

# -*- coding: utf-8 -*-
# case.rb

puts '数字を入力してください。'
loop{ # 無限ループをするメソッド

  a, op, b = STDIN.gets.split(' ')
  a = a.to_i
  b = b.to_i
  if op == "?"then
    break
  else
    puts(case op
         when '+'
           a + b
         when '-'
           a - b
         when '*'
           a * b
         when '/'
           a / b
         else
           break
         end)
  end
}