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;
import java.util.LinkedList;

class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        LinkedList<Integer> a = new LinkedList<Integer>();
        LinkedList<Integer> b = new LinkedList<Integer>();
        LinkedList<String> op = new LinkedList<String>();
        int n=0;
        while(true){
            n++;
            a.add(sc.nextInt());
            if(a.get(n-1)<0 || 20000<a.get(n-1)){
                System.exit(-1);
            }
            op.add(sc.next());
            b.add(sc.nextInt());
            if(b.get(n-1)<0 || 20000<b.get(n-1)){
                System.exit(-1);
            }
            if(op.get(n-1).equals("?")){
                break;
            }
        }
        for(int i=0; i<n-1; i++){
            if(op.get(i).equals("+")){
                System.out.println(a.get(i)+b.get(i));
            }else if(op.get(i).equals("-")){
                System.out.println(a.get(i)-b.get(i));
            }else if(op.get(i).equals("*")){
                System.out.println(a.get(i)*b.get(i));
            }else if(op.get(i).equals("/")){
                System.out.println(a.get(i)/b.get(i));
            }
        }
    }
}