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;

public class Main {
	public static void main(String[] args){
		int ans = 0;// ??¨????????????????¨?????????????
		String s[] = new String[3];
		Scanner scan = new Scanner(System.in);

		while(true){//??\???????????£????????°?????????????????????
			for(int i = 0; i < s.length; i++){ //i???s??????????????°????°??????????
				s[i] = scan.next();
			}
			int a = Integer.parseInt(s[0]);//?¨????????????¨????????°??????int
			String op = s[1];			   //????????????String?????????
			int b = Integer.parseInt(s[2]);//?¨????????????¨????????°??????int
			if(op.equals("?")){//??????\???????????????????????°????????????
				break;
			}else if(op.equals("+")){//?????????????????????
				ans=a+b;
				System.out.println(ans);
			}else if(op.equals("-")){
				ans=a-b;
				System.out.println(ans);
			}else if(op.equals("*")){
				ans=a*b;
				System.out.println(ans);
			}else if(op.equals("/")){
				ans=a/b;
				System.out.println(ans);
			}
		}//------------------------------------while
		scan.close();
	}
}