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.Linq;

namespace AizuOnlineJudge
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] arr;
            while((arr = Console.ReadLine().Split(' ').ToArray())[1] != "?")
            {
                Console.WriteLine(Calculate(int.Parse(arr[0]), int.Parse(arr[2]), arr[1]));
            }
        }

        private static int Calculate(int a, int b, string op)
        {
            switch(op)
            {
                case "+": return a + b;
                case "-": return a - b;
                case "*": return a * b;
                case "/": return a / b;
            }
            return 0;
        }
    }
}