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;
using System.Collections.Generic;
class main{
	public static void Main(){
		List<int> result = new List<int>(); 
		for(int i = 0; ;i++)
		{
			string[] str = Console.ReadLine().Split(' ');
			int a = int.Parse(str[0]), b = int.Parse(str[2]);
			char op = Convert.ToChar(str[1]);
			if (op == '?') break;
			switch (op)
			{
				case '+':
					result.Add(a + b);
					break;
				case '-':
					result.Add(a - b);
					break;
				case '*':
					result.Add(a * b);
					break;
				case '/':
					result.Add(b != 0 ? a / b : 0);
					break;
				default:
					continue;
			}
		}
		foreach (int ans in result)
		{
			Console.WriteLine(ans);
		}
		
		
	}
}