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.List;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);		

		List<Integer> a = new ArrayList<Integer>(); 
		List<Integer> b = new ArrayList<Integer>(); 
		List<Character> op = new ArrayList<Character>();
		
		while (true) {
			int _a = scan.nextInt();
			char _op = scan.next().charAt(0);
			int _b = scan.nextInt();

			if (_op == '?')
				break;
			
			a.add(_a);
			b.add(_b);
			op.add(_op);
		}

		for (int i = 0; i < a.size(); i++) {
			int _a = a.get(i);
			int _b = b.get(i);
			int _op = op.get(i);
			
			switch(_op) {
				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);
			}
		}
		
		scan.close();
	}
}