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 SimpleCalc
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			double a, b, ans = 0;
			string[] data;
			while (true) {
				data  = Console.ReadLine ().Split (" ".ToCharArray ());
				a = double.Parse (data [0]);
				b = double.Parse (data [2]);
				if (string.Compare (data [1], "?") == 0)
					break;

				switch (data [1]) {
				case "+":
					ans = a + b;
					break;
				case "-":
					ans = a - b;
					break;
				case "*":
					ans = a * b;
					break;
				case "/":
					ans = a / b;
					break;
				}

				Console.WriteLine (ans);
			}
		}
	}
}