Java--高精度加减乘除取余模板

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

class Main{
    public static void main(String[] args){
        Scanner cin = new Scanner(System.in);
        BigInteger a, b;
        String s1 = "a + b = ", s2 = "a - b = ", s3 = "a * b = ", s4 = "a / b = ", s5 = "a % b = ";
        a = cin.nextBigInteger();
        b = cin.nextBigInteger();
        // 加法
        System.out.println(s1 + a.add(b));
        // 减法
        System.out.println(s2 + a.subtract(b));
        // 乘法
        System.out.println(s3 + a.multiply(b));
        // 除法
        System.out.println(s4 + a.divide(b));
        // 求余
        System.out.println(s5 + a.mod(b));
    }
}