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.*;

public class Main{
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		List<Integer> answers = new ArrayList<Integer>();
		for(;;){
			String line = scan.nextLine();
			String[] div = line.split("\\s");
			int a = Integer.parseInt(div[0]);
			String op = div[1];
			int b = Integer.parseInt(div[2]);
			if(op.equals("?")){
				break;
			}
			int ans = 0;
			switch(op){
				case "+" :
					ans = a + b;
					answers.add(ans);
					break;
				case "-" :
					ans = a - b;
					answers.add(ans);
					break;
				case "*" :
					ans = a * b;
					answers.add(ans);
					break;
				case "/" :
					ans = a / b;
					answers.add(ans);
					break;
				default :
					break;
			}
		}

		for(int n : answers){
			System.out.println(n);
		}
		
	}
}