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;

public class Test
{
	public static void Main()
	{
		// your code goes here
		string[] s = Console.ReadLine().Split(' ');
		int a = int.Parse(s[0]);
		int b = int.Parse(s[2]);
		
		while(s[1] != "?") {
			int ans = 0;
			
			switch(s[1]){
				case "+":
					ans = a+b;
					break;
				case "-":
					ans = a-b;
					break;
				case "*":
					ans = a*b;
					break;
				case "/":
					ans = a/b;
					break;
			}
			Console.WriteLine(ans);
			
			s = Console.ReadLine().Split(' ');
			a = int.Parse(s[0]);
			b = int.Parse(s[2]);
		}
	}
}