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)

answers = Array.new
 
while true
    exp = gets.split(" ")
    break if exp[1] == "?"
    answer = exp[0].to_i + exp[2].to_i if exp[1] == "+"
    answer = exp[0].to_i - exp[2].to_i if exp[1] == "-"
    answer = exp[0].to_i * exp[2].to_i if exp[1] == "*"
    answer = exp[0].to_i / exp[2].to_i if exp[1] == "/"
    answers.push answer
end
 
answers.each{|ans|
    puts ans
}