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 = scan.nextInt();
		String str = scan.next();
		int b = scan.nextInt();

		switch(str)
		{
			case "+":
				System.out.println(a+b);
				break;
			case "-":
				System.out.println(a-b);
				break;
			case "*":
				System.out.println(a*b);
				break;
			case "/":
				System.out.println(a/b);
				break;
			case "?":

			default:
				break;
		}

		scan.close();
	}
}