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
{
  static void Main()
  {
    for(;;) {
      var s = Console.ReadLine().Split(' ');
      if(s[1] == "?") break;
      var a = int.Parse(s[0]);
      var b = int.Parse(s[2]);
      var r = 0;
      switch (s[1]) {
        case "+": r = a + b; break;
        case "-": r = a - b; break;
        case "*": r = a * b; break;
        case "/": r = a / b; break;
      }
      Console.WriteLine(r);
    }
  }
}