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 C# (judge verdict: Accepted)

using System;

namespace AOJ.ITP
{
    public class SimpleCalculator
    {
        public static void Main()
        {
            while (true)
            {
                var input = Console.ReadLine().Split(' ');
                int a = int.Parse(input[0]);
                int b = int.Parse(input[2]);
                string op = input[1];
                if (op == "?") { break; }

                int ans = 0;
                switch (op)
                {
                    case "+":
                        ans = a + b;
                        break;
                    case "-":
                        ans = a - b;
                        break;
                    case "*":
                        ans = a * b;
                        break;
                    case "/":
                        ans = (int)Math.Floor((decimal)a / b);
                        break;
                }
                Console.WriteLine(ans);
            }
        }
    }
}