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 JAVA (judge verdict: Accepted)

import java.util.Scanner;
import java.io.IOException;

class Main {
	public static void main(String[] args) throws IOException {
		Scanner scan = new Scanner(System.in);
		while (true) {
			int a = scan.nextInt();
			String str = scan.next();
			int b = scan.nextInt();
			if (str.equals("?")) {
				break;
			}
			switch (str) {
			case "+":
				System.out.println(a + b);
				break;
			case "-":
				System.out.println(a - b);
				break;
			case "*":
				System.out.println(a * b);
				break;
			case "/":
				System.out.println(a / b);
				break;
			}
		}
	}
}