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
ary = gets.split
a = ary[0].to_i
op = ary[1].to_s
b = ary[2].to_i
    case
    when op == "+"
        puts a + b
    when op == "-"
        puts a - b
    when op == "*"
        puts a * b
    when op == "/"
        if b == 0
            break
        else
            puts a / b
        end
    when op == "?"
        break
    end
end