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;

class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        
        while(true) {
            int a = scan.nextInt();
            String op = scan.next();
            int b = scan.nextInt();
            
            if(op == "+" ) 
                  System.out.println(a+b);
            else if (op == "-")
                  System.out.println(a-b);
            else if (op == "*")
                  System.out.println(a*b);
            else if (op == "/")
                  System.out.println(a/b);
            else break;
        }
     }
}