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) {
	Scanner s = new Scanner(System.in);
	int result = 0;
	while (true) {
	    int a = s.nextInt();
	    String op = s.next();
	    int b = s.nextInt();
	    if (op.equals("?")) break;
	    switch (op) {
	        case "+":
		    result = a + b;
		    break;
		case "-":
                    result = a - b;
		    break;
	        case "*":
		    result = a * b;
		    break;
	        case "/":
		    result = a / b;
		    break;
	    }
	    System.out.println(result);
	}
    }
}