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 int calc(int a, String op, int b){
    if(op.equals("?")) return 0;
    else{
      if(op.equals("+")) System.out.println(a+b);
      else if(op.equals("-")) System.out.println(a-b);
      else if(op.equals("*")) System.out.println(a*b);
      else if(op.equals("/")) System.out.println(a/b);
      return 1;
    }
  }

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int a, b;
    String op;
    while(true){
      a  = sc.nextInt();
      op = sc.next();
      b = sc.nextInt();
      if(calc(a, op, b) == 0) break;
    }
  }
}