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 Probrem {
    public static void Main() {
        while (true) {
            var strs = Console.ReadLine().Split();
            if (strs[1] == "?") return;
            var a = int.Parse(strs[0]);
            var b = int.Parse(strs[2]);
            Console.WriteLine(strs[1] == "+" ? a + b :
                              strs[1] == "-" ? a - b :
                              strs[1] == "*" ? a * b : a / b);
        }
    }
}