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.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // TODO 自動生成されメソッド・スタブ
        Scanner scan = new Scanner(System.in);


        while(true){
            int a = scan.nextInt();
            String op = scan.next();
            int b = scan.nextInt();
            int answer=0;

            if(op.equals("?")){
                break;
            }
            switch(op){
            case "+":
                answer= a+b;
                break;
            case "-":
                answer= a-b;
                break;
            case "*":
                answer = a*b;
                break;
            case "/":
                answer = a/b;
                break;
            }
            System.out.printf("%d\n",answer);
        }

    }

}