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.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ITP1_4_C
 * 
 * @author chrone
 * 
 */
public class Main {
    public static void main(String[] args) {
        try {
            BufferedReader stdReader = new BufferedReader(
                    new InputStreamReader(System.in));
            
            String sStr;
            while ((sStr = stdReader.readLine()) != null) {
                String[] inputs = sStr.split(" ");
                
                int a = Integer.valueOf(inputs[0]);
                String op = inputs[1];
                int b = Integer.valueOf(inputs[2]);
                
                if (op.equals("?")) {
                    break;
                    // nothing to do.
                }
                
                switch (op) {
                    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((int)(a / b));
                        break;
                }
            }
            stdReader.close();
        } catch (Exception e) {
            System.exit(-1);
        }
    }
}