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;

public class Main {
	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		int a = sc.nextInt();
		String op = sc.next();
		int b = sc.nextInt();
		
		for (;!op.equals("?");) {
			int ans = 0;
			switch (op) {
			case "+":
				ans = a + b;
				break;
			case "-":
				ans = a - b;
				break;
			case "*":
				ans = a * b;
				break;
			case "/":
				if (a == 0) {
					break;
				}
				ans = a / b;
			}
			System.out.println(ans);
			a = sc.nextInt();
			op = sc.next();
			b = sc.nextInt();
		}
	}
}