大数运算 Java模板

版权声明： https://blog.csdn.net/qq_40624026/article/details/81428069

用的Java大整数类

单组测试数据：

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

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
            BigInteger bigint1=in.nextBigInteger();
            BigInteger bigint2=in.nextBigInteger();
            System.out.println(bigint1.add(bigint2));//加法
            System.out.println(bigint1.subtract(bigint2));//减法
            System.out.println(bigint1.multiply(bigint2));//乘法
            System.out.println(bigint1.divide(bigint2));//除法
            System.out.println(bigint1.remainder(bigint2));//取余
            System.out.println(bigint1.gcd(bigint2));//最大公约数
    }
}

n组测试数据：

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

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        for (int i = 0; i < n; i++) {
            BigInteger bigint1=in.nextBigInteger();
            BigInteger bigint2=in.nextBigInteger();
            System.out.println(bigint1.add(bigint2));//加法
            System.out.println(bigint1.subtract(bigint2));//减法
            System.out.println(bigint1.multiply(bigint2));//乘法
            System.out.println(bigint1.divide(bigint2));//除法
            System.out.println(bigint1.remainder(bigint2));//取余
            System.out.println(bigint1.gcd(bigint2));//最大公约数
        }
    }
}