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;

namespace AOJ.intro
{
    namespace ITP_1_4_C
    {
        static public class Calclator
        {
            static public void Main()
            {
                while(true){
                    string[] inputData = Console.ReadLine().Split();
                    int a, b;
                    string op;
                    a  = int.Parse(inputData[0]);
                    b  = int.Parse(inputData[2]);
                    op = inputData[1];
                    int calcResult = 0;
                    string errMsg;

                    if (op == "+")
                    {
                        calcResult = a + b;
                    }
                    else if (op == "-")
                    {
                        calcResult = a - b;
                    }
                    else if (op == "*")
                    {
                        calcResult = a * b;
                    }
                    else if (op == "/")
                    {
                        if (b == 0)
                        {
                            errMsg = "0割り算です.";
                            Console.WriteLine(errMsg);
                            return;
                        }
                        calcResult = a / b;
                    }
                    else if (op == "?")
                    {
                        break;
                    }
                    Console.WriteLine(calcResult);
                }
            }
        }
    }
}