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);
       int a;
       String op;
       int b;
       
       for(;;){  
         a = scan.nextInt();
         op = scan.nextLine();
         b  = scan.nextInt();
         
         if(op == "+"){
              a += b;
         }else if(op == "-"){
              a -= b;
         }else if(op == "*"){
              a *= b;
         }else if(op == "/"){
              a /= b;
         }else{
              return;
         }
         
         System.out.println(a);
       }
    }
}