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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws NumberFormatException, IOException{
        try(BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {

            label:
            while (true) {
                String[] sArr = br.readLine().split(" ");
                int a = Integer.parseInt(sArr[0]);
                int b = Integer.parseInt(sArr[2]);
                String op = sArr[1];

                int res;

                switch (op) {
                    case "+":
                        res = a + b;
                        break;
                    case "-":
                        res = a - b;
                        break;
                    case "*":
                        res = a * b;
                        break;
                    case "/":
                        res = a / b;
                        break;
                    case "?":
                        break label;
                    default:
                        throw new RuntimeException();
                }

                System.out.println(res);
            }

        }
    }
}