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: Runtime Error)

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

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String line;
        while ((line = br.readLine()) != null) {
        
            String ary[] = line.split(" ");
            int num1 = Integer.parseInt(ary[0]);
            String op = ary[1];
            int num2 = Integer.parseInt(ary[2]);
            
            switch (op) {
                case "+":
                    System.out.println(num1 + num2);
                    break;
                case "-":
                    System.out.println(num1 - num2);
                    break;
                case "*":
                    System.out.println(num1 * num2);
                    break;
                case "/":
                    System.out.println(num1 / num2);
                    break;
            }
        }
    }
}