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 Test
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            var input = Console.ReadLine().Split(' ');
            var a = int.Parse(input[0]);
            var op = input[1];
            var b = int.Parse(input[2]);
            var result = 0D;

            switch (op)
            {
                case "+":
                    result = a + b;
                    break;
                case "-":
                    result = a - b;
                    break;
                case "*":
                    result = a * b;
                    break;
                case "/":
                    result = (double)a / b;
                    break;
                default:
                    return;
            }
            Console.WriteLine(result);
        }
    }
}