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.Linq;
using System.Text;

namespace _20170409_AOJ
{
    class Program
    {
        static void Main(string[] args)
        {
            string line;
            List<int> outList = new List<int>();

            for(;(line=Console.ReadLine()) != "";)
            {
                string[] sArr = line.Split(' ');
                int a = int.Parse(sArr[0]);
                string op = sArr[1];
                int b = int.Parse(sArr[2]);

                if (op == "?")
                {
                    break;
                }

                int r = 0;
                switch(op)
                {
                    case "+":
                        r = a + b;
                        break;
                    case "-":
                        r = a - b;
                        break;
                    case "*":
                        r = a * b;
                        break;
                    case "/":
                        r = a / b;
                        break;
                }

                outList.Add(r);
            }

            foreach(var v in outList)
            {
                Console.WriteLine(v);
            }

            Console.ReadLine();
        }
    }
}