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: Wrong Answer)

using System;
using System.Collections.Generic;

public class SimpleCalculator
{
    //???????????????????????????????¨??????????
    static void Main(string[] args)
    {
        /*---??£?¨???¨---*/
        List<string> dataSetList = new List<string>();
        string[] dataSplit; //????????????????????????????????????
        int i = 0;
        int leftNum;
        int rightNum;
        /*---??£?¨???¨---*/

        /*???????????????????????????(A op B???op??¨???????????????????)*/
        while (true){
            dataSetList.Add(Console.ReadLine());
            dataSplit = dataSetList[i].Split(' ');
            if (dataSplit[1] == "?"){
                break;
            }
            i++;
        }

        /*----?¨??????¨???????????¨----*/
        for (i = 0; i < dataSetList.Count-1; i++){
            dataSplit = dataSetList[i].Split(' ');
            leftNum = int.Parse(dataSplit[0]);
            rightNum = int.Parse(dataSplit[2]);

            switch (dataSplit[1]){
                case "+":
                    Console.WriteLine(leftNum + rightNum);
                    break;
                case "-":
                    Console.WriteLine(leftNum - rightNum);
                    break;
                case "*":
                    Console.WriteLine(leftNum * rightNum);
                    break;
                case "/":
                    Console.WriteLine(((double)leftNum / (double)rightNum).ToString("F5"));
                    break;
            }
        }
        /*----?¨??????¨???????????¨----*/
    }
}