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

        out_of_loop: while (true) {
            int a = Integer.parseInt(sc.next());
            String op = sc.next();
            int b = Integer.parseInt(sc.next());

            int ans = 0;

            switch (op) {
            case "+":
                ans = a + b;
                break;
            case "-":
                ans = a - b;
                break;
            case "*":
                ans = a * b;
                break;
            case "/":
                ans = a / b;
                break;
            case "?":
                break out_of_loop;
            }

            System.out.println(ans);
        }

        sc.close();
    }
}