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;

public class Test
{
	public static void Main()
	{
            string[] data;
            int ans = 0;
            
            while (true)
            {
                data = Console.ReadLine().Split();
                switch (data[1])
                {
                    case "+":
                        ans = int.Parse(data[0]) + int.Parse(data[2]);
                        break;

                    case "-":
                        ans = int.Parse(data[0]) - int.Parse(data[2]);
                        break;

                    case "*":
                        ans = int.Parse(data[0]) * int.Parse(data[2]);
                        break;

                    case "/":
                        ans = int.Parse(data[0]) / int.Parse(data[2]);
                        break;
                }

                if (data[1] == "?")
                {
                    break;
                }
                else
                {
                    Console.WriteLine(ans);
                }
            }
	}
}