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)

def calc(a, op, b)
  case op
  when '+'
    puts "#{a + b}"
  when '-'
    puts "#{a - b}"
  when '*'
    puts "#{a * b}"
  when '/'
    puts "#{a / b}"
  else
  end
end

loop do
    a, op, b = gets.split
    break if op == '?'

    calc(a.to_i, op, b.to_i)
end