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)

while true do
    a,op,b = gets.split
    case op
    when '+' then
      puts "#{a.to_i+b.to_i}"
    when '-' then
        puts "#{a.to_i-b.to_i}"
    when '*' then
        puts "#{a.to_i*b.to_i}"
    when '/' then
        puts "#{(a.to_i/b.to_f).floor}"
    when '?' then
        break
    end
end