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.ArrayList;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		ArrayList<Integer> x = new ArrayList<>();
		while (true) {
			int a = Integer.parseInt(in.next());
			String op = in.next();
			int b = Integer.parseInt(in.next());
			if (op.equals("?")) {
				break;
			}
			switch (op) {
			case "+":
				x.add(a + b);
				break;
			case "-":
				x.add(a - b);
				break;
			case "*":
				x.add(a * b);
				break;
			case "/":
				x.add(a / b);
				break;
			}
		}
		
		for (Integer ans : x) {
			System.out.println(ans);
		}
	}
}