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: Wrong Answer)


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

/**
 *
 * @author k16069kk
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException{
        
        int a = 0; 
        int b = 0;
        String op = null;
        int answer = 0;
        
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line = br.readLine();
        while((line = br.readLine()) != null){
            java.util.StringTokenizer st = new StringTokenizer(line, " ");
            while (st.hasMoreTokens()){
                a = Integer.parseInt(st.nextToken());
                op = st.nextToken();
                b = Integer.parseInt(st.nextToken());
            }
            switch (op) {
                case "+":
                    answer = a + b;
                    break;
                case "-":
                    answer = a - b;
                    break;
                case "*":
                    answer = a * b;
                    break;
                case "/":
                    answer = a / b;
                    break;
            }
            if(op == "?") break;
        }
        
        System.out.println(answer);
    }

}