java 高精度 加减乘除

减法

使用 java 大数类

import java.math.BigInteger; import java.util.*; public class Main { //高精度减法 public static void main(String[] args) { Scanner mc = new Scanner(System.in); String[] s = new String[10086]; for (int b = 0; b < 2; b++) { s[b] = mc.nextLine(); } BigInteger a = new BigInteger(String.valueOf(s[0])); BigInteger b = new BigInteger(String.valueOf(s[1])); BigInteger c = a.subtract(b); System.out.println(c); } } 加法 import java.math.BigInteger; import java.util.*; public class Main { //高精度加法 public static void main(String[] args) { Scanner mc = new Scanner(System.in); String a=mc.nextLine(); String b=mc.nextLine(); BigInteger num = new BigInteger(a); BigInteger num1 = new BigInteger(b); BigInteger c = num.add(num1); System.out.println(c); } } 乘法 import java.math.BigInteger; import java.util.*; public class Main { //高精度乘法 public static void main(String[] args) { Scanner sc = new Scanner(System.in); BigInteger num = new BigInteger(sc.next()); BigInteger num1 = new BigInteger(sc.next()); System.out.println(num.multiply(num1)); } } 除法 import java.math.BigInteger; import java.util.*; public class Main { //高精度除法 赋值 public static void main(String[] args) { BigInteger num = new BigInteger(String.valueOf("3")); BigInteger num1 = new BigInteger(String.valueOf("4")); System.out.println(num.divide(num1)); } } 比较大小 import java.math.BigInteger; import java.util.*; public class Main { //高精度 比较大小 public static void main(String[] args) { Scanner mc = new Scanner(System.in); while (mc.hasNext()) { BigInteger a = mc.nextBigInteger(); BigInteger b = mc.nextBigInteger(); if (a.equals(BigInteger.ZERO) && b.equals(BigInteger.ZERO)) break; int flag = a.compareTo(b); if (flag == -1) System.out.println("a<b"); else if (flag == 0) System.out.println("a==b"); else System.out.println("a>b"); } } } import j