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)
    {
        String str1, str2, str3;
        int a, b;
        int sum = 0;
        char op;

        while (true)
        {

            string[] str = Console.ReadLine().Split(' ');
            str1 = str[0];
            str2 = str[1];
            str3 = str[2];

            a = int.Parse(str1);
            b = int.Parse(str3);
            op = char.Parse(str2);

            if (op == '+')
            {
                sum = a + b;
            }else if (op == '-')
            {
                sum = a - b;
            }else if (op == '*')
            {
                sum = a * b;
            }else if (op == '/')
            {
                sum = a / b;
            }else
            {
                break;
            }
        Console.WriteLine(sum);
        }
    }
}