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;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            var answerList = new List<int>();
            int answer = 0;

            while (true)
            {
                String s = Console.ReadLine();
                string[] strInputList = s.Split();

                int a = int.Parse(strInputList[0]);
                String simbol = strInputList[1];
                int b = int.Parse(strInputList[2]);

                if (simbol.Equals("?"))
                {
                    break;
                }

                switch (simbol)
                {
                    case "+":
                        answer = a + b;
                        break;
                    case "-":
                        answer = a - b;
                        break;
                    case "*":
                        answer = a * b;
                        break;
                    case "/":
                        answer = a / b;
                        break;
                }
                answerList.Add(answer);
            }

            foreach (int value in answerList)
            {
                Console.WriteLine(value);
            }                     
        }
    }
}