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){
        
        Scanner sc = new Scanner(System.in);
        
        while(true){
            
            int a = sc.nextInt();
            String op = sc.next();
            int b = sc.nextInt();
            
            if(op.equals("?"))break;
            
            int ans = 0;
            
            switch(op){
            case "+":
                ans = a+b;
                break;
            case "-":
                ans = a-b;
                break;
            case "*":
                ans = a*b;
                break;
            case "/":
                ans = a/b;
                break;
            }
            System.out.println(ans);
        }
    }
}