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: Runtime Error)

using System;
using System.Collections.Generic;

namespace ITP1_4_C
{
    class Program
    {
        static void Main(string[] args)
        {
            var list = new List<string[]>();
            string input;
            while ((input = Console.ReadLine()) != "0 ? 0")
                list.Add(input.Split(' '));
            foreach(var l in list)
            {
                switch (l[1])
                {
                    case "+":
                        Console.WriteLine(int.Parse(l[0]) + int.Parse(l[2]));
                        break;
                    case "-":
                        Console.WriteLine(int.Parse(l[0]) - int.Parse(l[2]));
                        break;
                    case "*":
                        Console.WriteLine(int.Parse(l[0]) * int.Parse(l[2]));
                        break;
                    case "/":
                        Console.WriteLine(int.Parse(l[0]) / int.Parse(l[2]));
                        break;
                }
            }
        }
    }
}