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.util.Scanner;

class Main{
      public static void main(String[] args){
    	Scanner scan = new Scanner(System.in);
    	int a;
    	String op;
    	int b;
    	for(;;){
    	  a = scan.nextInt();
          op = scan.next();
          b = scan.nextInt();
        	
	  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);
	  }else{
	    	break;
	  }
    	}
     }
}