C++實驗題——大數類 tzc

import java.math.BigInteger;
import java.util.Scanner;

public class Main{
	public static void main(String[] argc) {
		Scanner cin=new Scanner(System.in);
		while(cin.hasNext()){
			BigInteger a=cin.nextBigInteger();
			String b=cin.next();
			BigInteger c=cin.nextBigInteger();
			if(b.equals("+")) System.out.println(a.add(c));
			else if(b.equals("-")) System.out.println(a.subtract(c));
			else if(b.equals("*")) System.out.println(a.multiply(c));
			else if(b.equals("/")) System.out.println(a.divide(c));
		}
	}
}