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) {
		try (Scanner sc = new Scanner(System.in)) {
			while (true) {
				int a = sc.nextInt();
				String OP = sc.next();
				char op = OP.charAt(0);
				int b = sc.nextInt();

				if (op == '?') break;

				int ans = 0;

				switch (op) {
					case '+':
						ans = a+b;
						break;

					case '-':
						ans = a-b;
						break;
						
					case '*':
						ans = a*b;
						break;
						
					case '/':
						ans = (int) Math.floor(a/b);
						break;
				}
				System.out.println(ans);
			}
		}
	}

}