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;

namespace AizuOnlineJudge
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] array;
            do
            {
                array = Console.ReadLine().Split(' ');
                Console.WriteLine(Calc(array));
            } while (array[1] != "?");
        }

        static int Calc(string[] array)
        {
            int a = int.Parse(array[0]); int b = int.Parse(array[2]);
            string op = array[1];
            int result = 0;
            switch (op)
            {
                case "+":
                    result = a + b;
                    break;
                case "-":
                    result = a - b;
                    break;
                case "*":
                    result = a * b;
                    break;
                case "/":
                    result = a / b;
                    break;
            }
            return result;
        }
    }
}