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 ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            double result = 0;
            bool Isend = false;

            List<string> resultlist = new List<string>();

            while (true)
            {
                string[] Input = Console.ReadLine().Split(' ');

                switch (Input[1])
                {
                    case "+":
                        result = int.Parse(Input[0]) + int.Parse(Input[2]);
                        break;

                    case "-":
                        result = int.Parse(Input[0]) - int.Parse(Input[2]);
                        break;

                    case "*":
                        result = int.Parse(Input[0]) * int.Parse(Input[2]);
                        break;

                    case "/":
                        result = int.Parse(Input[0]) / int.Parse(Input[2]);
                        break;

                    default:
                        Isend = true;
                        break;
                }

                //???????????\???(?)?????\???????????????????????????
                if (Isend) break;


                double truncation = Math.Truncate(result);
                resultlist.Add(truncation.ToString());

            }

            foreach(string output in resultlist)
            {
                Console.WriteLine(output);
            }

        }

    }

}