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;
using System.Collections.Generic;
using System.Text;

namespace AOJ
{
    class Program
    {
        static void Main(string[] args)
        {
            for (; ; )
            {
                var inputLine = Console.In.ReadLine();
                var inputs = inputLine.Split(new char[] { ' ', '\t', '　' });
                if (inputs.Length != 3)
                {
                    return;
                }

                var a = int.Parse(inputs[0]);
                var b = int.Parse(inputs[2]);
                var op = inputs[1];

                int result = 0; // dummy value.
                switch (op)
                {
                    case "+":
                        result = a + b;
                        break;
                    case "-":
                        result = a - b;
                        break;
                    case "*":
                        result = a * b;
                        break;
                    case "/":
                        result = a / b;
                        break;
                    case "?":
                        goto BREAK;
                }

                Console.WriteLine(result);
            }
        BREAK: ;
        }
    }
}