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: Wrong Answer)

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        Integer result = null;
 
        while(sc.hasNextLine()){
            int a = sc.nextInt();
            String o = sc.next();
            int b = sc.nextInt();
 
            if(a == 0 && b == 0){
                break;
            }else if(o.equals("?")){
            	break;
            }else if(o.equals("+")){
            	result = a + b;
            }else if(o.equals("-")){
            	result = a - b;
            }else if(o.equals("*")){
            	result = a * b;
            }else if(o.equals("/") && b == 0){
            	result = 0;
            }else if(o.equals("/")){
            	result = a / b;
            }
        }
        if(result != null){
        	System.out.println(result);
        }
    }
}