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: Wrong Answer)

using System;

    class Program
    {
        static void Main(string[] args)
        {
            String  str1, str2, str3;
            int a, b;
            int sum = 0;
            char op;

            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);

                
                switch (op)
                {
                    case '+':
                        sum = a + b;
                        Console.WriteLine(sum);
                        break;
                    case '-':
                        sum = a - b;
                        Console.WriteLine(sum);
                        break;
                    case '*':
                        sum = a * b;
                        Console.WriteLine(sum);
                        break;
                    case '/':
                        sum = a / b;
                        Console.WriteLine(sum);
                        break;
                    default:
                        break;
                }
            
            
        }
    }