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;

class MainClass
{
	public static void Main (string[] args)
	{

		while (true)
		{
			string str = Console.ReadLine ();
			string[] spStr = str.Split (' ');

			int a = int.Parse (spStr [0]);
			string op = spStr [1];
			int b = int.Parse (spStr [2]);

			if (op == "+") 
			{
				Console.WriteLine (a + b);
			} 
			else if (op == "-")
			{
				Console.WriteLine (a - b);
			} 
			else if (op == "*")
			{
				Console.WriteLine (a * b);
			}
			else if (op == "/")
			{
				Console.WriteLine (a / b);
			} 
			else if (op == "?")
			{
				break;
			}
		}
	}
}