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: Runtime Error)

import java.io.*;
public class Main{
	public static void main(String [] args) throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String str;
		char ope;
		int a,b;
		String[] st=new String[3];
		while(!(str=br.readLine()).equals("0 ? 0")){
		st=str.split(" ");
		a=Integer.parseInt(st[0]);
		b=Integer.parseInt(st[2]);
		ope=st[1].charAt(0);
		System.out.println(keisan(a,b,ope));
}
		}

		static int keisan(int a,int b,char operator){
		int result=0;
		switch(operator){
		case '+':result=a+b;break;
		case '-':result=a-b;break;
		case '*':result=a*b;break;
		case '/':result=a/b;break;
		}
		return result;
		}
		}