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.Linq;

public class Hello
{
    public static void Main()
    {
        string s;
        string[] str;

        while((s = Console.ReadLine() ) != null)
        {
            str = s.Split(' ');
            int x = int.Parse(str[0]);
            int y = int.Parse(str[2]);
            char c = Convert.ToChar(str[1]);

            if (c == '?') break;

            switch (c)
            {
                case '+':
                    Console.WriteLine(x + y);
                    break;
                case '-':
                    Console.WriteLine(x - y);
                    break;
                case '*':
                    Console.WriteLine(x * y);
                    break;
                case '/':
                    Console.WriteLine(x / y);
                    break;
            }
        }
    }
}