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 sc = new Scanner(System.in);
		
		List<Integer> results = new ArrayList<>();
		while(true) {
			
			String[] input = sc.nextLine().split(" ");
			if(input[1].equals("?")) break;
			
			int a = Integer.parseInt(input[0]);
			int b = Integer.parseInt(input[2]);
			
			switch (input[1]) {
			case "+":
				results.add(a + b);
				break;

			case "-":
				results.add(a - b);
				break;
				
			case "*":
				results.add(a * b);
				break;
				
			case "/":
				results.add(a / b);
				break;
				
			default:
				break;
			}
			
		}
		sc.close();
		
		results.forEach(System.out::println);
		
	}

}