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;

namespace ConsoleApp_ITP1_4_C
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> inputList = new List<string>();

            while (true)
            {
                string input = Console.ReadLine();

                if (input.Contains(" ? "))
                {
                    break;
                }
                else
                {
                    inputList.Add(input);
                }
            }

            foreach (string input in inputList)
            {
                string[] literalAndoperand = input.Split(' ');
                var literal1 = Int32.Parse(literalAndoperand[0]);
                var operand = literalAndoperand[1];
                var literal2 = Int32.Parse(literalAndoperand[2]);

                switch (operand)
                {
                    case "+":
                        Console.WriteLine(literal1 + literal2);
                        break;
                    case "-":
                        Console.WriteLine(literal1 - literal2);
                        break;
                    case "*":
                        Console.WriteLine(literal1 * literal2);
                        break;
                    case "/":
                        Console.WriteLine(literal1 / literal2);
                        break;
                }
            }
        }
    }
}