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 P
{
public static void Main()
{
            bool y = true;
            int z;

            while (y)
            {
                //????????????????????????
                var x = Console.ReadLine().Split(' ');

                //??????????????????
                int a = Int32.Parse(x[0]);
                int b = Int32.Parse(x[2]);
                string op = x[1];

                if (op == "+") 
                { 
                    z = a + b;
                    Console.WriteLine(z.ToString());
                }
                else if (op == "-")
                {
                    z = a - b;
                    Console.WriteLine(z.ToString());
                }
                else if (op == "*")
                {
                    z = a * b;
                    Console.WriteLine(z.ToString());
                }
                else if (op == "/")
                {
                    z = a / b;
                    Console.WriteLine(z.ToString());
                }
                else
                {
                    y = false;
                }
            }
}
}