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.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class Main {

    public static void main(String[] args) throws IOException {

        ArrayList<Integer> x = new ArrayList<>();
        ArrayList<String> st = new ArrayList<>();
        ArrayList<Integer> y = new ArrayList<>();

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        while (true) {
            
            String[] line = br.readLine().split(" ");
            if ("?".equals(line[1])) {
                break;
            }
            x.add(Integer.parseInt(line[0]));
            st.add(line[1]);
            y.add(Integer.parseInt(line[2]));

        }

        for (int i = 0; i < x.size(); i++) {
            if ("+".equals(st.get(i))) {
                System.out.println(x.get(i) + y.get(i));
            }

            if ("-".equals(st.get(i))) {
                System.out.println(x.get(i) - y.get(i));
            }

            if ("*".equals(st.get(i))) {
                System.out.println(x.get(i) * y.get(i));
            }

            if ("/".equals(st.get(i))) {
                System.out.println(x.get(i) / y.get(i));
            }
        }

    }

}