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;

class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);

		StringBuilder sb = new StringBuilder();
		while (in.hasNext()) {
			int a = in.nextInt();
			char op = in.next().charAt(0);
			int b = in.nextInt();

			if (op == '?') {
				break;
			}
			switch (op) {
			case '+':
				sb.append(a + b).append("\n"); break;
			case '-':
				sb.append(a - b).append("\n"); break;
			case '*':
				sb.append(a * b).append("\n"); break;
			case '/':
				sb.append(a / b).append("\n"); break;
			default:
				break;
			}
		}
		System.out.print(sb.toString());
	}
}