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 ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            //?????????????????§??????????????????????????????????????????
            while(true){ 
                string[] s = Console.ReadLine().Split(' ');
                int a = int.Parse(s[0]);
                int b = int.Parse(s[2]);
                string op = s[1];


                //op?????????£?????´????????????????????????
                if (op == "?") break;


                //op????????????????????\???????¨???????????????????
                switch (op)
                {
                    case "+": Console.WriteLine(a + b);
                        break;

                    case "-": Console.WriteLine(a - b);
                        break;

                    case "*": Console.WriteLine(a * b);
                        break;

                    case "/": Console.WriteLine(a / b);
                        break;

                    default : break;
                }


            }

        }
    }
}