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 Program {
    static void Main( string[] args )
    {
        while ( true ) {
            string[] s = Console.ReadLine().Split();

            if ( "?" == s[ 1 ] ) {
                break;
            }

            int a = int.Parse( s[ 0 ] );
            int b = int.Parse( s[ 2 ] );
            int r = 0;

            switch ( s[ 1 ] ) {
                default:
                case "+": { r = a + b; break; }
                case "-": { r = a - b; break; }
                case "*": { r = a * b; break; }
                case "/": { r = a / b; break; }
            }

            Console.WriteLine( r );
        }
    }
}