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: Runtime Error)

a = gets.split
a[0]=a[0].to_i
a[2]=a[2].to_i
until a[0] == 0 && a[1] == "?" && a[2] == 0 do
if a[1] == "+" then
 puts "#{a[0]+a[2]}"
end
if a[1] == "-" then
 puts "#{a[0]-a[2]}"
end
if a[1] == "*" then
 puts "#{a[0]*a[2]}"
end
if a[1] == "/" then
 puts "#{a[0]/a[2]}"
end
a = gets.split
a[0]=a[0].to_i
a[2]=a[2].to_i
end